This is a major problem. The DCEU is a shared universe, which kind of implies that they'd focus on the "shared" and the "universe" parts of it, and not just use it as a platform to try out varying shades of Batman while the other characters stand around marveling at how goddamn great Batman is. Marvel has had huge successes with the shared universe concept, as their characters and stories match each other. When Iron Man shows up, we know what we're getting into. We know that Robert Downey Jr.'s character is a consistent one, and isn't the victim of a director bursting through the wall to shout "NO, IRON MAN WOULDN'T DO THAT."
But when it comes to Batman, the order of importance seems to be:
1. "This is how MY Batman would be."
2. Everything else.
Since 1989, we haven't had a director take on a Batman movie without establishing some kind of weird ownership over the character. Whether it was Tim Burton or Joel Schumacher or Nolan, every filmmaker who gets the task of filling our screens with bat stuff puts their own spin on it which makes it absolutely separate from any other DC film. Even Zack Snyder, who was a main creative force in the DCEU, couldn't be bothered to wonder how he could tonally mesh Batman with other characters. Instead he just shoved Batman in there and hoped that the rest of the movies would work themselves out.
And now, we're getting not only another Batman standalone film that is wholly unrelated to the events of the DCEU, but also a Joker origin movie that is similarly separate. Why? Because it seems that trying to fit these versions of Batman and various Batman-related characters into the established DCEU would be too much of an ordeal, so fuck it. "Go do your own special revolutionary Batman thing over there, while we do our own special revolutionary Batman thing over here, and in the end we can, well, just make more special revolutionary Batman things. Forever." Audiences just love it when they become interested in a character, only to find out that nope, while this character is still the same character, it's not THAT character. So they can just deal. And don't give me that "No, it's definitely part of the DCEU, it's just got no connections to it" explanation. That's like saying, "Oh yeah, I'm coming to your birthday party. Wouldn't miss it. However, I AM just gonna be on my phone the whole time."