“Avengers: Age of Ultron” stars Johansson, Evans, Downey, Chris Hemsworth as Thor, Mark Ruffalo as The Incredible Hulk and Jeremy Renner as Hawkeye -- James Spader plays the villain, Ultron.

Age of Ultron, on the other hand, was pretty much just a movie. A sequel movie, at that; the film opened not quite as huge as The Avengers, and grossed significantly less.

Each Avengers film has changed Marvel’s Cinematic Universe in major ways, but Age of Ultron might have gone the farthest in rewriting the status quo. Sure, Infinity War and Endgame gave us the ...