Look Marvel has shown how much they love Iron Man in the 10 year anniversary stuff. They smacked him right in the middle of everything! You had to write an essay about him for the contest! They had RDJ pose with the producers instead of other characters for the magazine. They KNOW he has wielded the infinity gauntlet in the comics and now they have created a VR game where the player can equip infinity stones on the armor.

I’m just saying, if my son, Tony Stark, does not wield the Infinity Gauntlet in either Avengers 3 or 4; Marvel has committed a grievous sin against all of humanity

I had to look it up and yep, there is a VR game called “Hero Vision” where you play as Iron Man and can equip Infinity Stones to Iron Man’s gauntlet.

So much points to Tony being the one to wield the Infinity Gauntlet to unfuck this mess: 

  • Tony is a metaphor for the phoenix – a creature known for rising from the ashes. In the Infinity Gauntlet comic, when Thanos snapped his fingers, everyone just disappeared. But in the movie? They turned to ash. While this could simply be an artistic decision, there could very well be a symbolic connection there. 
  • Dr. Strange saved Tony after looking into the future to see the one out of 14,000,605 possibilities where they win. This heavily implies that Tony’s survival is necessary to defeating Thanos. 
  • Tony’s arc will have come full-circle if the man who used to be known as the “Merchant of Death” is the one who brings everyone back to life.
  • Tony’s mysterious recurring left arm trauma would have been foreshadowing all along to him using the Infinity Gauntlet (which is left-handed). Both the Russos and Markus & McFeely have emphasized the damage the gauntlet did to Thanos’s left arm. 
  • Thanos and Tony are clear narrative parallels to one another, so Tony being the one to undo what Thanos has done is more than fitting.
  • Tony is the only hero that Thanos referred to by name and seemed to know, which implies a history there. 
  • Tony is the only other character known for using a “gauntlet” as a weapon – and Iron Man’s gauntlets are often used to represent him (look at the trailer for Wreck It Ralph 2 for a recent example). 
  • It all started with Iron Man, so Iron Man being the one to close it is poetic.