That was actually the whole premise of my favorite storyline in Flash; the alternate universe version of a previous season's big bad got stuck in the main characters' universe and had to deal with everyone hating him for things that were entirely out of his control. Made more complicated by the fact that he'd made a really bad, like city-ruining mad scientist mistake on his world, which was why he was in their world to begin with, so he kinda had his own redemption arc going on, but not actually for the things that the serial-killer version of him had done. It was really a lot of fun.