User blog comment:Aranryanchampion/One Final Announcement Blog + Empty Slot 4 confirmed!!/@comment-24024492-20140915200142/@comment-7200907-20140916121317

I have not thought about that, if you mean:

Clear Classic Mode with Rorshach to unlock Dr. Manhattan

But maybe once the full roster has been decided, I might decide who should be unlockble. But that most likley will not happen and if it did, I probably would not go into detail about how you unlock the characters.

But it is still an intressting suggestion, thank you for bringing it up :)