Sukuna in the Multiverse of Madness

When Kai's hunted monitor dragged him to another world as Sukuna, the first thing he came across were zombies but why are there vampires here and is that Iron Man? ------------------ This fic isn't related to dimension travelling or traveling to other universes, it all just happens within a single world. The main story will follow alongside MCU but the story will contain several other movies wrapped up neatly within a single world.