I'm not surprised that Avengers: Doomsday theories have been running rampant in MCU fan communities online recently, but I find several to be particularly convincing, despite how wild they are. Although it is still largely shrouded in mystery, recent announcements have confirmed several cast members for Avengers: Doomsday, several months after it was revealed that Robert Downey Jr. would be portraying the titular arch-villain, Doctor Doom. These developments have offered ample information with which to formulate some incredible theories about what might transpire.