I think more players should be let into this game. I also think that it is okay when some characters have to sit out on a mission because then it doesn't force everyone into a mission that maybe one of the characters could have handled on their own. It just makes everything feel forced. I don't mind if Superman sits out regularly because he's a powerhouse character. If he isn't doing anything requiring his level of involvement, then it's kind of a waste of time. He can also be summoned later if the mission calls for it. He doesn't have to be there from the get-go.