Ben Affleck won't make 'The Batman' if the script isn't "good enough".

Ben Affleck

Ben Affleck

The 44-year-old actor is currently penning the script for the solo movie - which he plans to both star in and direct when it goes to production next year - and has said he's determined to find a winning formula for his storyline as he would hate to make a "mediocre version" of a Batman movie.

Speaking to Entertainment Weekly magazine, he said: "I'm still working on the script. I'm not going to write and direct anything that I don't think is good enough to be made.

"I'm definitely going to make sure I have something that is special -  there's not enough money in the world to make a mediocre version of Batman worth it."

Whilst the majority of the movie's plot details are being kept under wraps, it was revealed last month that Joe Manganiello would be stepping up to take on the role of supervillain Deathstroke.

The 39-year-old actor said at the time that this take on The Caped Crusader would be "fresh", and is set to "surprise" audiences.

He said: "When I met Ben we sat down and we talked about, you know, the role. We talked about the movie. His take is a fresh take but I think the audience is going to be surprised. Because it's a road that no one's really gone down that's completely integral to who Batman is. And I think it's gonna be refreshing but at the same time completely familiar. But it's going to take this franchise in a direction that I think a lot of people are going to be really happy about."

'The Batman' - the latest confirmed project in the DC Extended Universe from Warner Bros. Pictures and DC Entertainment - is expected to be released in 2018.