Director Joss Whedon has said in several interviews, many of the characters he wanted to put in the film had to be cut for various reasons. Included in the bunch? Fan-favorite Loki played by Tom Hiddleston.
Here are three characters that almost made it into "Age of Ultron":
Captain Marvel
Marvel
However, Marvel Studios President Kevin Feige thought it would have been unfair to introduce this character hastily at the end.
"[Captain Marvel] was in a draft." Feige told Birth. Movies. Death. "But to me, it would have done that character a disservice, to meet her fully formed, in a costume and part of the Avengers already when 99% of the audience would go, 'Who is that?' It's just not the way we've done it before."
However, in a way, Captain Marvel did leave her mark in the movie, as her planned shots ended up going to Scarlet Witch (Elisabeth Olsen).
"The way we reveal Scarlet Witch [in costume] at the end of the movie? Those were Captain Marvel plate shots. Joss said, 'We'll cast her later!' And I said, 'Yeah Joss, we'll cast her later.' [Whispers to an invisible associate who isn't Joss] 'We're not putting her in there!'" Feige said.
We'll see Captain Marvel in her own standalone movie in 2018.
Loki
Disney / Marvel
However, "Ultron" was already filled to the brim, and adding Loki into the mix may have been too much.
"We did shoot something, but it didn't play." Whedon told MTV News. "The movie has so much. It's so filled. We didn't want it to feel overstuffed. I really wanted to have Loki in it, but I understood the decision that there were now too many voices in the chorus."
Spider-Man
Sony Pictures
Sony and Marvel couldn't reach a deal on time.
"So I would have put [Captain Marvel and Spider-Man] in, but neither of the deals were made. And then they were like, 'We're making a Captain Marvel movie and we've got Spider-Man as a property,' and I'm like, 'I've already locked my film, you f---ers! Thanks for nothing.'" Whedon told Empire.