I also think it's Jay in the mask. But my guess as to "Jay's" identity would be Edward Clariss, aka The Rival, Jay Garrick's reverse flash, who uses a formula called Velocity 9 to gain temporary super speed.
I also think it's Jay in the mask. But my guess as to "Jay's" identity would be Edward Clariss, aka The Rival, Jay Garrick's reverse flash, who uses a formula called Velocity 9 to gain temporary super speed.