Interview with Stephen Reid

Some additional info here, including clarification on the ability to gain heroes and costumes ingame. Sounds like it's going to be a kind of boss hunt, though supposedly they're making it so the first run through nets people at least a handful of heroes to play with.

http://metalarcade.net/2013/01/marvel-heroes-interview-with-stephen-reid/#.UPmtzCdQV8F