Honestly its not that hard to defeat them, first you obtain the infinity gauntlet and snap one out of existence, then you only have to fight one of them, really simple actually.

No actually it won't be as good since I killed basically all of the cast of that movie so, sorry!

Iron man dies in sonic.

Spider-Man comes back from the snap only to literally get eaten by Thanos. Oh, forgot this : SPOILER ALERT