Wouldn't DC Comics have a final say in it?
No, DC Comic is still under Warner Bros, every crossovers have been to be approved by them.
And Warner Bros is a rival of Paramount, pretty sure they don't want to promote a game full of their rival's mascots.
Most CrossWorlds guest characters (Spongebob, Patrick, TMNTs, Avatar Legends) are from Nickelodeon Group, a sub-division of the Paramount Media Networks.


