On the other side of things, I imagine TPTB want to keep their gravy train rolling. If you look at the studios producing CBM and their grosses, you see WB is in a good position financially.
It took DC 3 films (both Nolan and DCEU) to gross over $2 billion WW.
It took Sony 3 films with Spider-Man to gross over $2 billion WW.
It took Marvel 5 films to gross over $2 billion WW.
It took Fox 6 films with the X-Men to gross over $2 billion WW.
These companies are basically a business, and looking at the DC numbers, I imagine TPTB are trying their best to continue the trend and keep the audience happy. After Avengers 1, the MCU became unstoppable. Sony dropped out after TASM 2 and cancelled their planned Spidey shared universe. Quantity wise, the XCU has nearly as many films as the MCU, but financially, people just don't seem to care about the X-Men. Fox's biggest hits were DOFP and Deadpool. The latter being a film nobody at Fox wanted to make.
While Batman and the Flash seem to be having troubled pre-production, WW, JL and Aquaman are all on schedule. Yeah, Aquaman is the one with the least problems and is about to begin shooting soon. The rub with the Flash movie seems to be making it different from the popular TV show. With Batman, I surmise it's a juggling act between the suits at WB, Affleck (who is still writing and producing) and the directors their looking at. Plus, we have Gotham City Sirens and Suicide Squad 2 coming as well.
To talk about Marvel for a moment, they also have their share of executive meddling and creative talent walking away from their projects.
Jon Favreau and Mickey Rourke's bad experience after Iron Man 2.
The Avengers getting a page 1 rewrite by Whedon, because the original script was terrible.
Ant-Man being in development hell for years and Edgar Wright finally walking away.
Thor The Dark World had Patty Jenkins (the current director of WW) walk away 2 weeks before shooting was to start. Natalie Portman was dissatisfied with how she was treated and declined to return to any future Marvel projects. The replacement director Alan Taylor also made comments that weren't positive about his experience.
Joss Whedon's departure after Age of Ultron and his comments about working with Marvel. Which at the time were inflammatory. He's since cooled about his experience.
We had the the changing hats for the Black Panther director, before we finally settled on one.
Captain Marvel was announced back in 2014, was pushed back twice and reportedly, there is still no script for the movie. Marvel also wants a female director to helm it, like DC did for WW.
So, not all that glitters is gold. Try not to let your passions get the best of you in these talks. I imagine we constantly hear about DC/WB's issues on the cycle/recycle of online news outlets because DC is the biggest competitor for Marvel, and people want to see if they sink or swim. Which is interesting to me, because the X-Men IP has it worse than DC, but nobody cares about Fox's films to the same degree.