A reboot wouldn't accomplish anything. Why? Because WB does not want to spend money to make these films happen. Look at how many films have been announced and been delayed or cancelled. The execs at WB want that MCU money, but they don't want to spend money to get there. The DC films are in the same place that Star Trek and Star Wars on films are. Neither Paramount or Disney wants to invest the kind of money they would need to for them to be a success. A large part of that is hiring the right people to run the show.
In 2021, we had 3 DC films released. WW84, ZS JL and The Suicide Squad. As of right now, only one of them is getting a sequel. WW84. The lowest rated film among critics and audiences. Remember the vanity project for Margot Robbie, Birds of Prey? Virtually forgotten. You will also recall that WB submitted both BOP and WW84 for Oscar consideration and both were rejected. While Joker won WB an Academy Award. Joker being the film we are all supposed to hate. Remember how the Snydercut only got released because AT&T (WB's parent company at the time) overruled WB and gave Snyder the go ahead. And then, a month after the Snyder Cut was released. WB started advertising the release of the theatrical JL in 4K blu-ray on Youtube. Tone deaf doesn't begin to describe the decision structure there.
Check the ratio. It's really bad.
https://www.youtube.com/watch?v=PXrgvNXfN7M
Now, we are getting Shazam 2, Aquaman 2, Black Adam and Flash (hopefully). But there are a lot of other IPs people are demanding to see and WB has no plans to capitalize on that demand.
Hey! Remember that New Gods movie that was announced, before Marvel announced the Eternals movie? Then New Gods was cancelled right after ZS JL was debuted on HBOMax. Who is running the ship at WB? Seriously.
What people are saying about DC is true. The main villain isn't Darkseid, it isn't Trigon, it isn't the Anti-Monitor. It's WB.
The solution is simple, but I doubt WB would ever go for it. And that is to have an outside production company foot the bill for a film's cost. Tom Cruise does that for the Mission Impossible movies, Vin Diesel does it for the Fast and Furious and Riddick movies, Ryan Reynolds did it for Deadpool 1, etc. A big part of why films like Mission Impossible and Fast and the Furious are still being made, is because the actors are footing the bill with their own production companies. Dwayne "The Rock" Johnson has his own production company (which he used to produce the Hobbs and Shaw movie without Diesel and is using to produce Black Adam), Tyler Perry has his own production company & studio, George Lucas famously had his own production company, studio and special effects company. And of course, Marvel Studios was it's own independent production company before being bought by Disney.
That's what DC needs. Their own benefactors and production company. With WB being the distributor for the films releases.