If all we're going off of for Wells not being Professor Zoom is the synopsis that says Wells is helping to stop Professor Zoom, I'm not buying it. And it still jives with my theory that Wells is Professor Zoom prior to becoming Professor Zoom, it's possible that both Wells and Zoom can exist at the same time because of time travel.
The producers assured us that Wells is a new character.
But some of us don't trust them.
Remember Rudolf West... Joe's Brother?
(Kid Flash's daddy.)
Postcrisis, Rudy was replaced by a Manhunter (precursor to the Gren Lanterns, insane AI built by the Immortal Guardians of the Universe, intent on destroying all biological life to bring order and harmony.) who still somehow retained an albeit strained relationship with his family, but the strained bit might have been because he was an asshole and not that he was an evil robot trying to destroy all life in the universe.
Rudolf West's inner deadbeat jerk who would not pay child support was stronger than the machine that had downloaded his personality as a disguise to watch Wally and then recruit or destroy him.
Edit.
Google is suggesting that Rudolph is an agent of the Manhunters and not an actual robot, which is way lass cool.