During an interview with Yahoo, Mark Ruffalo talked about tensions between Universal Studios and Marvel, which is preventing a solo Hulk film.
Is a solo Hulk movie is possible: “I think they’ve been working on it. Marvel and Universal famously don’t get along very well, and so that’s working against us, definitely. But I know for a fact that everyone is holding out hope that one day we can do it. But the nature of the relationship right now, it’s a little prohibitive. But right now it doesn’t look particularly promising.”
If he’s started work on Thor: Ragnarok: “No, they’re still writing the script. That’ll start shooting this summer. In June. There’s still a lot of work to do on that.”
On the secrecy of Marvel Studios: “They definitely don’t want people to know what was going on for a while. I’ve been sworn to secrecy, to the point where they don’t even tell me. And they keep an eye on you. You might get a call. I tend to walk dangerously close to the line, as I generally have since I was a young boy, and so you do get the calls, like, ‘OK, let’s be a little careful here.’”