I expect deaths in the upcoming battle, the villain can't become this powerful without having a couple important deaths before he is taken down. Having said that, if Eraserhead can pull of being able to stop specifically the decaying quirk, I wouldn't complain if Shigaraki is defeated (for now, he escapes or something) in this fight. Because the only OP quirk Shigaraki has for now is his decaying, stopping it would make him defeatable, since All for One has been defeated at least twice before.