All the guys are there. Tony Stark is a cocky jerk. Captain America is an earnest virgin. Thor is sexy and dumb and confident. The Hulk is Mark Ruffalo when he's not the Hulk. Jeremy Renner is also there. The Black Widow maybe slept with some of them at some point. She's hot but not very interesting. There might be some other guys. Samuel L.Jackson, for instance. They all joke around and squabble.

There is a talking computer light box named Ultron that is voiced by James Spader. He drives everyone crazy and gives them all nightmares that we all see and they are very entertaining.

Then they beat Ultron. There's lots of explosions and noise. But they win. However, we will see the Avengers again.