There has been a lot of behind-the-scenes talk with one of Marvel's next movies, but it seems like it could be looking at a big movie according to one of the writers who came in to do some work on the script after Edgar Wright left.

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Adam McKay sat down with Collider on Friday and talked about some of the work he did on Ant-Man and what it was like working after Wright left.

"[Rudd] called me when Edgar Wright stepped away from the project and told me what was going on," he said.

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"I went and met with Marvel, and I was a little dubious just because I'm friends with Edgar and I didn't know what the story was, and then when I kind of heard what happened, that Edgar had parted ways, and then I saw their materials, I was like, 'God this is pretty cool'. Ultimately I didn't want to jump in as a director, I had too many other projects going and it was too tight, but I thought, 'You know what, I can rewrite this, and I can do a lot of good by rewriting it.'"

McKay also talked about the work that he and star Paul Rudd did on the film and how he feels it will do now.

"I've always known Paul Rudd's a really good writer from improvising with him on set, but I had no idea he was that good-he's really great with dialogue. So the two of us holed up in hotel rooms on the east and west coast, and I think it was like six to eight weeks we just ground it out and did a giant rewrite of the script," he said.

"I was really proud of what we did, I really thought we put some amazing stuff in there and built on an already strong script from Edgar Wright and sort of just enhanced some stuff."

He added that fans should expect a bigger and more aggressive script that Wright had, which means more action is on the way.

"We just shaped the whole thing, we just tried to streamline it, make it cleaner, make it a little bigger, a little more aggressive, make it funnier in places-we just basically did a rewrite," McKay said.

"Edgar had a really good script. But we just had a blast, and Rudd was just so much fun to write with. I walked away saying, 'Hey, you and I gotta write a script together.'"

Ant-Man is expected out on July 17, 2015.