lol i love both marvel and dc lol add em all like everyone like E V E R Y O N E ! I know thats impossible you would like have over 10 thousand workers (yes yes yes) the game can hold that much and more but would take you 5 years to do at least, you know how many alternate versions of superman there are lol. Is this going to be like a one world universe type of thing?? If so you coukd make it like several alternate universes merged into one.