, Thanos, Namor, and a few other not-good figures survived too because Reed purposefully crashed the Ultimate Universe with 616. They were found by Doom's police, who are just Thors (hasn't been explained fully I think????) and had to escape. Strange betrayed Doom by sending the good guys away as well which lead to his death by Doom. That's from the main Secret Wars storyline. There are other storylines which are very important to Battleworld as well.