The Flash Season 3: 10 Big Questions That Must Be Answered
2. Who Is Doctor Alchemy (And What Will He Do?)
Doctor Alchemy is a villain The Flash has been promising for a while now, with the character first teased for an appearance ahead of Season 2. While that obviously failed to happen, the character is now coming in Season 3, and what's more is he's going to be the Big Bad (or one of them, anyway).
In the comics, he's a former police forensics officer, who just so happens to now be a criminal who possesses the Philosopher's Stone (so much for Nicholas Flamel and Albus Dumbledore deciding it would be destroyed...) and uses it to transmute any element he wishes.
He's only briefly seen in the trailer, glimpsed in a hood and a mask that looks like some sort of Kylo Ren cosplay. Not much else is known about the show's take on the character, though it has been said his identity will be a mystery. That may mean he's someone we've already seen, or at least a recognisable name (and there are already theories that's who Tom Felton really is). Hopefully it's a bit more compelling than Zoom's last year, and also they can do something more effective with his arc, though what that will be - and whether it'll be constrained solely to Flashpoint or not - remains to be seen.