I've seen Thanos replaced with Superman but not a thread asking what if superman was part of the avengers assault.
Battles go on as they would in order of the movies except Superman is an added character in the fight against Thanos.
Ex: Thanos vs Thor, Loki, Hulk etc on the ship as the first match up but Superman is on the ship as well.
Would he be able to help the Avengers stop Thanos? If so at what point? Or does Thanos clear?