Doomsday theory pits Robert Downey Jr.'s Doctor Doom against Josh Brolin's Thanos in a battle that ends badly for the Mad Titan.

Marvel Studios had plenty of options to offer a welcome change of pace after the Avengers defeated Thanos, instead of Doctor Doom.

While the tweet was in keeping with Trump’s love of trolling memes, it quickly boomeranged once other users began pointing out Thanos is the Marvel Cinematic Universe’s mass murdering ...