Heres the thing.
This whole WB doesnt have a plan thing is an assumption. This is an assumption from fans, based on hearsay.
There is absolutely nothing concrete to suggest that WB does not have a plan, or, even better, multiple options (backup plans). They'd be idiots if they didn't.
The people inside WB have said what WB is saying. They would like to make those movies. Theyre working on it. They havent said exactly how theyre going to approach it, and that is their right in a business environment.
Marvel, beyond talking about properties it wanted to adapt, didnt tip its hand, either, until it was more or less ready to go into production.
That is how movies are made. Even Marvel Studios, for each of its films, took something like a decade to get them off the ground or develop.
WB is arguably about a half decade behind with regard to the superhero craze. Marvel is ahead because it is ONLY devoted to that craze.
Its not rocket science.
Making a $200 million dollar film isnt easy. Its not impossible, but it takes immense resources, even just to develop a film.
This is what is lost on people, and its endlessly annoying to hear fans whining over and over again about the "failure" in an industry they don't understand the workings of.