True dude, if Batman had used a gun to shoot and kill the Joker I think those movies would have lost all meaning. Same here, Superman killing somebody put a dagger through my 5 year old nephews heart who sees his father as the man of steel. Imagine trying to explain this one to him, oh boy.
I've beaten the main storyline stuff but always down for endgame stuff or partying with people to complete story stuff if I'm online. Username is StayXPuft. Rolling around with a level 22 Colossus, might replay the game with some of the free-characters I unlocked when I initially beat the prologue and main storyline.
I'd probably have the extreme ghostbuster team lead by Hawkeye. I'd also kinda wanna figure out a way to shoot in Jean Luc Picard to play some sort of pivotal role on the team maybe like a data analyst type like Oracle.