I'm expecting some kind of zombie uprising.
I always thought zombies were the dumbest of all the classic monsters. Vampires and werewolves are both way better, and so is man-made monsters ala frankenstein or awakening ancient evil curses, and obviously lovecraftian eldritch beings awakening are just top tier apocalyptic horror. But it's not like the real world has proven itself to be above idiocy.
So yeah, fucking zombies. Why not. We don't deserve the dignity of being ended by Cthulhu.