Since announcing that the X-Men: First Class sequel merging the casts of the prequel film and the original X-Men franchise would be the X-Men: Days of Future Past storyline, some fans have had a qualm with the adaptation of the iconic story arc. In the comic books, it's actually Kitty Pryde (Ellen Page) who travels back in time to save they day. However, writer Simon Kinberg has changed that detail so that it's Wolverine (Hugh Jackman) who goes back in time to meet with the young original X-Men and their emerging villains. Many have been incredulously asking why, and there are a few reasons to explain that.

Speaking with Total Film, Kinberg says:

"We made the decision for a lot of reasons, some of them obvious and some of them more nuanced, to make it Wolverine who goes back in time. One reason is that he’s the protagonist of the franchise, and probably the most beloved character to a mass audience.
Probably the bigger reason is that when we started thinking about the logistical realities of Kitty’s consciousness being sent back in time, to her younger self, as opposed to her physical body being sent back. It was impossible. Obviously in the book it’s Kitty, but you’re talking about an actress (Ellen Page) who, in the age of Michael Fassbender and James McAvoy, would have been negative 20 years old. So we started thinking again, and the first reflex response to that was a character who doesn’t age. Wolverine is the only character who would looks the same in 1973 as he does in the future."
It's no surprise that using Hugh Jackman, playing the presumed favorite character from the series, as the protagonist is smart from a business standpoint, but it's the story detail that makes more sense in the way Kinberg has adapted the time travel story. And if the trailer is any indicator, it seems like they made the smart decision to send Wolverine back in time to deal with a young, disheveled Professor X (James McAvoy), especially when it comes to the (future) history between the two characters. Hopefully that explanation is good enough to stop some complaints, but you can't please everyone. Thoughts?