The Avengers star Mark Ruffalo has said that he would be keen to make a solo Hulk film with a strong eco-friendly message.
Speaking at the Sundance Film Festival promoting his new film Infinitely Polar Bear, Total Film quotes him as saying: "As artists we have an ability to reach a lot of people in a deep way, and we have a responsibility.
"What we have to do as storytellers is to take science and make it relatable.
"I think we have to tell the story of the positive and what we're going to try to do. Give them alternatives but don't make it a polemic."
The actor, who played Bruce Banner in The Avengers, added that green was "the way to go" with a new Hulk, pun intended.
He said: "I think that's the way to go, and it's a trend that'll start to develop. As a culture, when we latch onto a fad, we're actually working something out in the creative subconscious.
"The fact that all these doomsday and end-of-times movies are coming out is because we're actually working that out in the culture."
He added: "I'm in The Avengers, but if you took my screentime it would come to about ten minutes, along with the 12 other people I'm sharing the screen with, so my input's kind of limited on that.
"But if we get to a standalone Hulk movie, I'll have a much better chance to do that. I'm just learning now how to find my voice and bring it into the studio world."