11. The New Avengers Line-Up (Avengers: Age Of Ultron)
At the end of Avengers: Age of Ultron, after Iron Man, Hulk, Thor and Hawkeye had all headed off on their own path, Black Widow and Captain America prepared to train a new Avengers line-up. Audiences then got their first glimpse of Falcon, Vision, Scarlet Witch and War Machine as a group.