Mark Ruffalo's Hulk and Jeremy Renner's Hawkeye will have the spotlight firmly on them in the Avengers follow-up, it has been revealed.
The characters haven't been seen in further films since Avengers Assemble was released in 2012.
But Marvel Studios boss Kevin Feige told website Joblo.com that the characters would have "very big parts" in The Avengers: Age Of Ultron.
Asked about the possibility of a Hulk sequel, he said: "It's a good question. I would love to do that with Mark Ruffalo.
"But part of the fun of Age Of Ultron was saying, you've seen another Iron Man adventure before, you see another Thor adventure and another Cap adventure, but we haven't seen the Green Goliath again.
"So that was important in the characters you haven't seen - Hulk being one of them and Hawkeye being one of them - Ultron will make up for it. They have very big parts in Age Of Ultron."
Age Of Ultron is being directed by Joss Whedon and will be released in May 2015.