Mark Ruffalo recently characterized Marvel's "Thor: Ragnarok" as "a universal road movie" hinging on the relationship between Bruce Banner and Chris Hemsworth's god of thunder. The actor has also suggested a changing dynamic between the Hulk and his alter ego, but how might that shake out on screen?

That's precisely what director Taika Waititi ("What We Do in the Shadows") and Marvel Studios are trying to work out.

"It's interesting, because at the moment, there's a big conversation that's happening about how far to push that," Waititi told HitFix at the Sundance Film Festival, "whether or not the Hulk should be [verbal/conscious]."

"I think a lot of those conversations have more to do with what's going to come up in future movies," the filmmaker continued. "So I think a lot of those decisions are larger group decisions, rather than anything to do with just me or the writer. They have a lot of stuff that they have to consider. But I do think that's the best way to track it. I think we all want that. I think we all want to see that development and the evolution of that character. I also think you can do it in a fun way."

"Thor: Ragnarok" opens Nov. 3, 2017.