Jon Snow, by rights, should be sitting on the Iron Throne at the end of Game Of Thrones season 8. There are plenty of contenders to rule Westeros going into the final season: that Cersei's pregnancy proves the Valonqar prophecy wrong and she'll stay in power; that Tyrion will betray Daenerys to stand at his sister's side; that Daenerys will finally get the throne she's wanted since season 1. But the biggest, of course, is that Jon Snow, the bastard of Winterfell, will end the series as the King of the Seven Kingdoms.

Jon Snow as King has definitely gained in popularity since the Game of Thrones season 6 finale when it was confirmed that he actually has a legitimate claim to the throne (prior to this, fans simply wanted to see him as King because he's one of the few people in Westeros who is just a straight up good guy). It was revealed that Lyanna Stark, Ned's sister, hadn't been kidnapped by Rhaegar Targaryen at all, but had instead ran away with and married him; they were Jon's parents. Lyanna died after giving birth in the Tower of Joy, but was able to give her infant son (Aegon) to her brother to protect. He took the child home and raised him as his own bastard.

At the start of Game of Thrones season 8, Jon still doesn't know the truth about his parentage, but other people do - and if/when Jon discovers the truth, he could make a play for the Iron Throne himself. However, to do so, he may have to find a way to prove that he is, in fact, a Targaryen. Here's what he needs to do.

PROOF OF RHEAGAR TARGARYEN AND LYANNA STARK'S MARRIAGE



Throughout Game of Thrones, Jon has always struggled with being a bastard. He's not the only one, either - there's some serious stigma attached to it in Westeros, and the inability to inherit was one of the reasons that Jon decided to take the Black and join the Night's Watch. What else is a bastard son to do? However, it turns out that he isn't a bastard at all - and the proof of that is the record of marriage between Lyanna Stark and Rhaegar Targaryen, and the annulment of Rhaegar's marriage to Elia.

This record currently exists in the journals of High Septon Maynard, which Gilly found while she and Sam were at the Citadel. Of course, at the time, Sam didn't think that the passage Gilly read was of any importance, but since returning to the North, he has learned from Bran exactly what it means. At the moment, it's not clear whether or not the diary containing this information was among the books that Sam stole when he left to return to Winterfell, but if it is, he has in his possession the only legal record that would prove Jon is a legitimate son of Rhaegar Targaryen.

Of course, it's equally possible that Sam did not bring this diary with him, and it's unlikely that the Maesters of the Citadel would rush to back him up on his claims. After all, Sam disobeyed orders to heal Jorah, and then stole from the Citadel and ran away. Gilly would be able to back up his claims of having seen the journal, but as usual, Gilly would no doubt be under-estimated as an untrustworthy wildling girl.

TESTIMONY FROM HOWLAND REED AND BRAN STARK



Of course, even if Sam has the journal with him, and everyone believes that it tells the truth, that doesn't prove that Lyanna had a baby, nor that the baby grew up to become Jon Snow. All it proves is that there was a secret wedding and that Rhaegar's marriage to Elia was annulled. In order to fully make his claim, Jon would have to get some eyewitnesses to the battle at the Tower of Joy to confirm that Lyanna had a child, she named him Aegon and gave him to Ned Stark. Thankfully, there are two people still alive in Westeros who could back this up.

The first is Bran Stark, aka the Three-Eyed Raven. Bran saw the entire scene in a vision, so would be able to fully recount the battle at the Tower of Joy. However, Bran may not be someone that people are likely to believe. He is a Stark, but he was missing for a long time, presumed dead. Now, he's back with strange powers, visions, and tales of having been beyond the Wall with the Children of the Forest - it's easy to see how someone might be skeptical of his tales of a secret wedding and baby Targaryen who just happens to be his brother making a claim for the throne. It's likely that Bran will be believed in the North, where he has supporters and where people are significantly more superstitious and happy to believe in magic, but further South? Unlikely, although he may be able to prove his abilities in other ways to lend credence to his claim.

Someone who would be able to give a much more reliable (and widely believed) account of the events of the Tower of Joy would be Howland Reed, the only other survivor of the Tower of Joy. The father of Meera and Jojen hasn't appeared in Game of Thrones beyond Bran's vision and it's not quite clear what he's been up to, although he did send his children to Bran, so he's clearly still minorly active in world events. It's possible Howland - either of his own accord or with some prodding from Bran - could provide first-hand proof of Jon's true identity and claim to the Iron Throne.

GAME OF THRONES ISN'T ABOUT WHO DESERVES THE THRONE



However, even if Jon is able to prove the legitimacy of his claim to the Iron Throne, Westeros doesn't exactly have a long history of accepting the next in line as King. The Targaryens may have ruled since Aegon's Conquest, but even within that family there has been plenty of fighting over the throne; the Targaryen history is littered with stories of battles between siblings (and battles of dragon against dragon) as the person who felt that they were more deserving sought to overthrow the technical next in line. The Dance of Dragons may be the most famous of these Targaryen wars for the throne, but it is not the only one.

And since Robert's Rebellion, claims to the throne have been even more tenuous. Robert Baratheon won the throne by force, and since his death, Westeros has been crowded with wannabe Kings - many of whom claim that the throne is theirs by right. Stannis Baratheon believed he was the rightful king because Cersei's children were bastards by her own brother. Cersei herself has now taken the throne, after having killed her rival Queen, even though she should technically be the Queen Mother at this point, nothing more. Gendry is the son of Robert Baratheon (albeit a bastard), and there's obviously still Daenerys complicating any move Jon may make. All of the warring factions of Westeros are hardly about to lay down their arms and hail a resurrected Lord Commander of the Night's Watch as King, no matter how solid his claim may be.

But, beyond the talk of legitimacy and right to the throne, there is the simple fact that Game of Thrones has never been about unraveling the mystery of the true heir. From the first season, the show has been happy to kill off the righteous and the good kings as readily as the bad. Ned Stark was beheaded in season 1, despite being a loyal and noble hand. Robb Stark, who would conceivably have been a good king, was killed off as brutally as Joffrey, who was spoiled and sadistic. Tommen and Margaery are dead while Cersei survives.

This is not a series where the good triumph and the evil perish. Game of Thrones is a series about "bastards and broken things" with an ending that has been called "bittersweet" - which doesn't exactly leave fans believing that Jon's story will end with him rewarded for his goodness and triumphant on the Iron Throne. Nor anyone: one of the most persistent Game of Thrones theories is that Iron Throne will be destroyed - literally or figuratively - and rule of the Seven Kingdom's redefined.

It's also worth noting that Jon himself doesn't necessarily want to be King. Jon, from the start, will do his duty, but doesn't seek out power. He's thrown in his lot (in more ways than one) with Daenerys, and even when they find out the truth about Jon/Aegon, it may well not change anything - except maybe their relationship with each other. Then again, the Targaryens were all about keeping the family line pure, so it may make no difference at all.

Either way, even if Jon could prove his right the Iron Throne in Game of Thrones season 8, it may not be enough, and he may not even want it.

Game of Thrones returns to HBO for its final season on April 14.