User blog comment:AceAttorney/Amazing Spider-Man reviews/@comment-5235765-20121120050329/@comment-2031194-20121121134930

I really don't know why it would be anybody else besides Norman Osborne, but Mysterio could be a possibility, as the mysterious man appeared and vanished. A strong rumor is it's Electro, because there's a god chance he is going to be in the next movie, but I really doubt he was the man in the cell. (They say when the lightning flashes, that's him coming in through the window... again I'm skeptical there, I'm pretty sure the lightning was just for thematic purposes)