Iron-Man and Captain America will be friends forever.
Chris Evans has finished his portion of Avengers 4. That means the man who played Captain America for the last eight years has completed his contract with Marvel. Evans revealed in the past that he planned on putting down the shield once his contract was up, but that was years ago. It's possible that Evans changed his mind, or at least, that's what MCU fans are hoping. In reality, one of two things will occur in the next Avengers film. The first, more obvious ending, would be Captain America sacrificing himself to save his friends. If you think about it, Thanos had to sacrifice someone to get the Soul Stone. If the Avengers plan on going back in time, or finding any way to reacquire all the stones on their own, they will have to make a sacrifice as well. The second less obvious ending might have Captain retire and walk away into the proverbial sunset.
Evans took to Twitter last week to announce that he had wrapped filming for Avengers 4. "Officially wrapped on Avengers 4. It was an emotional day to say the least," he wrote. Robert Downey Jr. has been right there alongside Evans for the entire Avengers run, and Iron-Man himself took to Twitter to respond to the news. He shared a photo of Buzzlightyear and Woody from Toy Story. The two Disney cartoons were reimagined as Tony Stark and Steve Rogers, with the title "To Infinity And Beyond" altered to include the word "War" as a nod to the last Avengers film. "We all know who the real sheriff in town is @ChrisEvans," wrote Downey Jr., paying his utmost respects to Evans. There will never be another Captain America... until Disney decides otherwise.