Ben Affleck’s new movie Gone Girl opens in October and he’s already starting to promote it. We can probably expect a lot of new interviews over the next couple of months, which means lots of Batman v Superman: Dawn of Justice questions as well!

Entertainment Weekly chatted with Affleck recently and got his thoughts on playing Batman, the fan backlash last summer, and more. Check it out!

So what it’s like to portray Batman?

I’m right in the middle of shooting now. It’s a process that I’ll probably have better perspective on when I’m done. I can tell you that every time I do a role, it’s the responsibility of an actor to get their physical self as close to the role as possible. And Batman’s obviously got a set of expectations that are tough. So I spent a lot of time working out. And it’s a far cry from Gone Girl where my character is described as “puffy and hungover.” I want you to know I worked equally hard at both! [laughs]

It feels slightly ridiculous using the word “outcry” describing your casting. But there was actual outcry—a lot of people freaked when they heard about Batfleck. To what extent did all that get under your skin?

Before I took the role, Warner Bros. gave me a bunch of past reactions to casting and said, “Are you sure you want to get into this? This is part and parcel of these movies now. There’s a lot of active fans with a lot of opinions.” To me, having been through a certain amount of that, it doesn’t really… Everyone’s entitled to their opinion. I wouldn’t have taken the part if I didn’t trust my instincts in terms of the filmmaking. I think Chris Terrio wrote a terrific script. Zack’s a great visual director. And there’s an interesting take. I wouldn’t have done it if I didn’t think I could do it. I have the benefit of a lot of that understanding. But also, everyone is entitled to their opinion. That’s a big part of this international sport. The Fifty Shades of Grey kid or whatever it is. That’s sort of become a thing.

Fans feel like their vote counts.

You know what? It’s great that people do care that much. They want to see the movie that much. And it is incumbent on you to honor the story. There are the Greek myths and these are the American myths. The American myths are these superheroes. People care about ‘em a lot. And it’s incumbent on you to do a good job and make it as excellent as you possibly can. At the end of the day, the movie’s all that matters.