While the premise sounds interesting, I have to agree with Raineh. It seems rather complex and would severely cut down on character interaction. You may be better off pushing players to write out the characters realising who/what their classmates are on their own, or with some prompting. If you really want to keep up the mystery element, you could make it so the players have to puzzle out who any NPC/villain characters are. 

That said, if you manage to come to a happy middle-ground with this idea, I may be interested. I have been looking for a superhero RP.