For months now, it's felt like Ben Affleck has been negotiating in public with Warner Bros. over the future of The Batman. While it's clear fans want it to happen, he doesn't seem convinced, and it now looks like the project has come to a temporary halt. According to BOF (an admittedly hit and miss source in terms of reliability), production has now been "pushed back" by "a couple of months."
Why does this matter? Joe Manganiello and Jeremy Irons have previously indicated that shooting would begin the Spring, but this would push shooting to the summer. As a result, that rumoured July 2018 release seems extremely unlikely, though plenty of superhero movies have been made and released in around the same sort of timeframe. For the most part, however, they're not good ones!
Here's where things get potentially concerning, though. The article's author claims that they've heard "it's a mess" in regards to Justice League. Considering the fact that Warner Bros. scrambled to change the tone following the response to Batman v Superman: Dawn of Justice and it suddenly went from being a two-part movie to a standalone, perhaps that shouldn't come as too huge of a surprise!
The good news here is that nobody is saying Wonder Woman is a mess so it could potentially be the first well received DCEU film.