Guardians Of The Galaxy director James Gunn has told how he spent ages in negotiations with Marvel bosses to use villain Thanos in his movie.
Thanos is the alien baddie glimpsed at the end of Avengers Assemble and James had to fight for just a brief inclusion of him in his own version, even though he was originally envisioned as the film's main villain in a draft by co-writer Nicole Perlman.
James said: "I wanted Thanos in the movie. I wanted to be attached to The Avengers.
"Admittedly, Thanos was a giant pain in the a** because I had to talk with (Avengers writer-director) Joss Whedon and those guys. That was the one part where there were a lot of discussions. At a certain point, I think everyone just gave up, and we just did what we wanted."
Unlike Avengers, which relied on five decades of superhero history and five films to build up its team, the Guardians Of The Galaxy comic series is only a few years, and is based a ground a motley group of outsiders in the Marvel universe.
Wrestler Dave Bautista who plays Drax the Destroyer said: "It's a challenge because nobody really knows who we are, and the cool thing about that is we're starting from scratch.
"We can make it whatever we want it to be. The possibilities are endless when you're talking about outer space and all these different civilizations. It can go as far as your imagination can go."
James said: "I'm so glad to have the first one done because I can't wait to do more and not to have to set up as much stuff as I had to set up.
"I have so many things in my head. I really could just live in this universe. Who knows what I'll feel like in a few years, but I know Chris [Pratt who plays Peter Quill/Starlord] and I have said that we're both happy just doing this right now."