The Big Problem
The problem, and an obvious one at that, is that Kreisberg's comments seemto be completely paradoxical: Zoom is actually 'Hunter Zolomon'... also known as 'Jay Garrick'... who has been deceiving the S.T.A.R. Labs team this entire time... until he was killed by Zoom. Instead of immediately jumping to the conclusion that Kreisberg is trying to intentionally confuse or mislead the fans instead of explaining the twist, let's take his quotes and compare them to what we know so far.
Zoom's true identity is Hunter Zolomon. That's the same name sported by Earth-1's version of Jay Garrick, adopted and raised by the Zolomons after his mother died in childbirth. Jay took Caitlin to see Zolomon reading quietly in the park - but what were audiences actually looking at? Going by Kreisberg's comments, the Hunter Zolomon they witnessed was of no importance: Jay is Hunter Zolomon, operating under a false name. So alright, fine: Jay Garrick isn't Jay at all. He's Hunter, bearing a false name and moving the show's characters like pawns in his larger game, operating as Zoom when needed.
But that still leaves one massive problem.
Jay was apparently killed by Zoom as the final breach closed. Just moments after Jay closed the breach from Earth-1's side, while Zoom simultaneously held Wells hostage on the Earth-2 side, we would add. Since the show is based more on fantasy than actual science, it was possible that speed mirages were one solution, allowing Zoom and Jay to be in two places at one time (with some lightning quick costume changes happening on a constant loop). But the final scene of "King Shark" changed all that.
No speed mirages, no trickery or clever deception at work, since Zoom arrives at his lair with the lifeless Jay Garrick in his arms. Without that scene, a single man could have been responsible for both sides of the character.
We would offer that it's still possible that Hunter Zolomon subjected some poor Garrick doppelganger (perhaps the oblivious Hunter reading in the park?) to the kill, but even that seems to be a stretch.
So there you have it: there is no Jay, there is no Zoom - only Hunter Zolomon, playing both parts. But that still leaves one character shrouded in mystery. A character who, from the first moment he was introduced to the show tapping a mysterious message that seemed to be the key - is still looking like the biggest mystery yet to be solved.
The Man in The Mask
As a pleasant surprise, the not-quite-neat-and-tidy explanation offered by Kreisberg does seem to solve the problem of multiple Jay Garricks, as many fans and fan sites (including Screen Rant) voiced suspicion that it was the 'real' Jay Garrick beneath the metal mask, held prisoner in Zoom's lair. With Zoom and Jay Garrick one and the same, and hailing from Earth-2, then Earth-1's doppelganger could make a perfect stand-in for a convincing kill. Which means it's a completely different character under the mask.
Kreisberg seems to confirm that the new question is going perfectly to plan, as he explains to EW:
"Just when we solve one mystery, we like to set up another one. The identity of the man in the mask is, in some ways, probably an even bigger surprise than this one, if you can imagine it. It’s a new mystery to pull you through the season. Barry swore he wasn’t going to leave him behind. Something tells me Barry’s going to make good on that promise."
We can't say we doubt Barry's commitment, either. But if it is Jay Garrick - or rather, a Jay Garrick - underneath the mask, then where did he come from? Jesse Wells' claim that he had been in the cell since Zoom's extortion scheme had kicked off means he couldn't be Earth-1's Zolomon, but his determination to tap out 'Jay' to his fellow prisoners seems to be the first clue to the mystery.
Obviously, that mystery is one the showrunners hope to keep intact until the end of the season. But with fans already hot on the trail of a new riddle, who knows how much they'll uncover?
What do you think of the big reveal of the man underneath the black mask? Did you expect it to be a familiar face, but with an alternate-Earth twist? Or are you holding off any speculation or theories until there's more information to work with? We look forward to hearing your theories on the comments, and watching as the real mystery of 'Zoom' unravels...
The Flash returns March 22nd @8pm on The CW.