User blog comment:Supervillainer/Identity of the man in the iron mask/@comment-27129692-20160217111228/@comment-27408389-20160218083044

That's true. Many people are saying that the man in the iron mask was trying to say that Jay Garrick was Zoom, but I think it's probably a trick made by the producers. Nothing in the Arrowverse is as simple or obvious as people believe.

I personally don't think the man in the iron mask is the real Jay for multiple reasons:

Jay previously said he was 6'4, but the man in the iron mask didn't seem to be that tall. Again, that could be an illusion of the camera angle, but many have pointed out that the man's neck had a few wrinkles, so I think he's probably an older character (like Jay's father or Henry Allen).