Board Thread:The Flash discussions/@comment-25029540-20160512005546/@comment-26624146-20160523030754

It's Jay Garrick the twin of Hunter Zolomon. Jay was born to the Zolomons but was swapped and adopted by a member of the Garrick family, Henry Allen's family. When Hunter became a speedster so did Jay but he kept Jay locked up because he's also a speedster and needed his Speed Force to cure himself of Velocity-6 illness. Ever question how why Hunter was so much faster than Barry initally and knew he needed Speed Force to cure himself, I have always doubted that the Velocity-6 which was only balanced when Caitlin fixed the formula made Zoom so much faster, but if he already had Jay's speed on top of his own plus a little extra from Velocity-6 that would explain it. Maybe Jay's speed force wasn't enough and that's why he needed Barry's. Also note that the prisoner is in a carbine cell specifically to counter metahuman powers.

Also the Iron Mask story seems to be based on the the real man in the iron mask story who was believed to be the brother of Loius XIV's identical twin.