The biggest mystery of The Flash's second season is the identity of the main antagonist, Zoom. Who's under the mask? They haven't revealed his identity on the show yet, but apparently it's going to happen soon, so in the meantime, here's my five picks (four from Earth-2 and one who isn't) on who it might be.
It would also be dramatic as hell. Imagine The Flash coming face to face with himself. After all, they say that you are your own worst enemy.
Of course there might be a tiny little problem with this. In "Welcome to Earth-2", Earth-1 Barry talks to his counterpart's mom on the phone and she mentions her and Barry's dad going on a trip to Atlantis for their anniversary. I'm assuming that its Henry she's going with, but on the other hand, what if it isn't? We don't know how different Nora and Henry Allen are on Earth-2, so they might not be married here and she was referring to a second husband.
Now, what's interesting here is that in the comics Hunter Zolomon is the name of...Zoom. Personally, I feel like this might be too on the nose and Zolomon is nothing more than a red herring meant to misdirect the comic book fans and people who google character names. Still, having a character who has the same name as the season's antagonist is something that can't simply be ignored. I'm also wondering if there's any significance to the book Zolomon is reading in the above picture. It's Siddhartha by Hermann Hesse. I've never read it, so I have no idea if there's a hidden clue there or not.
The question of course is how Jay knew about Earth-1 and Barry? In the season one finale, Barry experienced visions of future events while opening a breach to send Reverse-Flash back to his timeline. Did Jay have similar visions and saw E-1 Barry and how fast he was?
So who is Zoom? We'll just have to wait until he's unmasked to see if any of my choices are right. Hopefully they won't keep us waiting for much longer.
All pictures from the Arrowverse Wiki.