While making the rounds at Sundance for his film, Infinitely Polar Bear, Mark Ruffalo (The Avengers) commented about some of his more high-profile works, namely The Avengers: Age of Ultron and a possible standalone Hulk movie.  He shared his thoughts on writer-director Joss Whedon's script for the sequel, and attempted to assure fans that Banner/Hulk would get to add on to his scene-stealing performances from the original film.  Ruffalo, an outspoken environmentalist, also expressed his intent to bring an eco-friendly message to a standalone Hulk movie, if it ever gets off the ground.  Hit the jump to see what he had to say.

In an interview with MTV while at Sundance, Ruffalo said the following about The Avengers: Age of Ultron's script:

"I would say that it's better, it's cooler, it's more awesomer. It's a little bit darker, but also really has Joss Whedon's incredibly, witty and sly sense of humor ... [Bruce Banner] gets to do such great stuff."

In a more eloquent moment recorded by Total Film, Ruffalo also talked about the responsibility he felt as an artist:

"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."

Ruffalo's vision is to bring this pro-environment idea to the forefront, not in the Avengers sequel in which he shares quite a bit of screentime with his assembled cast, but in a possible Hulk film:

"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 ... 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."

Head to the comments and be sure to let us know your thoughts about Ruffalo staring as a "green" Hulk in a standalone film.