Thanos sure is an interesting fellow, isn't he? Sure, he wiped out half of the universe during the events of Avengers: Infinity War but we're all hoping he gets his comeuppance when Avengers: Endgame comes out on April 26. While the Mad Titan seems fearless, this insane fan theory from Times Now News suggests that Thanos actually fears Iron Man, who is only a rich guy with a suit of armor.
Billionaire, playboy, philanthropist too, sorry.
Anyhoo, the theory points out how Thanos has the opportunity to kill various Avengers throughout Infinity War but chooses not to. He could have easily killed Thor instead of leaving him to die in space but he didn't and that almost cost him. The Mad Titan could have also made easy work of characters like Doctor Strange, Spider-Man, Captain America, and more but chose to let them live.
Yet, the purple man was willing to kill Iron Man until Strange offered him the Time Stone. The theory suggests that Thanos knows that someone as smart as Iron Man could eventually topple his plans, hence the attempt to kill him. This probably adds to the theory that Strange saw Stark as one of the survivors in his visions and knew that he could defeat Thanos with the other Avengers (and Captain Marvel).
With Avengers: Endgame coming out soon, we can only assume that Thanos will be kicking himself for not killing Stark or the other Avengers. We'll have to wait and see what he does about it.
Avengers: Endgame comes out on April 26. Captain Marvel is now showing in theaters.