In the quote he stated that when WB approached him about taking the reins of The Batman after Affleck made a decision to step away as writer/director and just focus on acting, "they said 'It's a standalone thing".
He tweeted, "Just to be clear: Of COURSE Batman will be part of the D.C. Universe". "Batman will be BATMAN..."
"Since Matt Reeves' solo Batman movie "#The Batman" has been in the news, people have doubted whether or not #Ben Affleck would play the Caped Crusader in the film.More news: Thousands stuck on cruise ships after Hurricane Harvey
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The production of The Batman has been marred by behind the scenes drama and intrigue regarding its plot, nearly since Ben Affleck first signed onto the film as star and director. Finally Cracked the Code for DC Movie Success?
But Warner Bros.is still working on at least one movie that takes place outside of its DC Extended Universe. While fans might assume this was Matt's idea, a way of making the project something of his own, the director says Warner Bros. presented him it. It's much like what Marvel did prior to the Avengers.
More recently, a news piece on the Joker origin film suggested that Ben Affleck was out as Batman, altogether.
What is going on with The Batman?
"He's not going to do that movie, I don't think". But it could be that Warner and Reeves are hoping to return to the one-chapter format with The Batman, instead of using it as a jumping off point for never-ending sequels. While Reeves still has apes on the brain, he shares some early thoughts on his next movie, for now titled The Batman. And it could be a simple way of letting Affleck leave the role he seems eager to be done with after Justice League. The release date was pushed back and the main villain apparently axed - and now we're left wondering if Affleck has left the project altogether, leaving the Dark Knight's cowl to be picked up by another. Shazam! is supposed to be the next DCEU film in the pipeline, but it has gone through a major scope change with Dwayne Johnson's Black Adam no longer being part of it, and still doesn't have a lead star cast.