It’s beginning to look like Iron Man is going to utilize his Proton Cannon in Avengers 4.
The Proton Cannon is a famous weapon from the Marvel vs. Capcom 2: New Age of Heroes arcade game from 2000.
Now, a new Avengers 4 set photo teased the iconic Proton Cannon again.
However, going further back, the Proton Cannon first appeared in Capcom’s Marvel Super Heroes arcade game, which came out in 1995, and was Iron Man’s main weapon.