Ronnie Raymond — aka one half of the nuclear superhero Firestorm — will return in The Flash: Season 2, when Robbie Amell guest stars in an upcoming episode - but in a very different manner than viewers are used to.



"You can’t keep a good Firestorm down," executive producer Andrew Kreisberg told Entertainment Weekly. "Only this time, he’s back with a twist, a deadly Earth-Two version of our beloved Ronnie in the form of Deathstorm.”
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The second season of The Flash has opened the series' universe to a number of parallel universe counterparts. Villainous versions of Doctor Light and Atom Smasher have already made it through, and it seems like this incarnation of Ronnie is next.

The aforementioned Deathstorm is the relatively recent creation of Geoff Johns and Ivan Reis. This version seems to be a blend of the character's original and modern incarnations. The former was a resurrected Ronnie Raymond turned bad. The latter is actually a parallel-universe Marin Stein — Firestorm's second half — who is already set to appear on DC's Legends of Tomorrow.