Repost from another thread but it's relevant to this one :
The more I think about it, the more I wonder if Warner really care about Batman being in a shared universe or not. What they want really, is Batman in theaters, on a regular basis, and people coming.
Stay with me here : Reeves' take on Batman will stretch from here to, what, six years?
In that time, it will be at least three before a single movie from this new DCU hits theaters. Take another three, where other key characters are reintroduced like Superman, Green Lantern, Martian Manhunter or whatever, and the new Batman could finally only show up at the time of the team-up movie, right when Reeves and Pattinson will have finished their work. Just because the character isn't introduced from the start, doesn't mean he couldn't become very important to the universe, as Gunn said.
There you have it all : a studio happy with Batman in theaters every two years for at least a decade, no headaches about multiple Batmans running around at the same time, Reeves take remaining self-contained, and, if everything goes right, a DC universe that will be well built, ready to welcome its Batman later on.
This could even let a door open for the studio to, at that moment, ask Pattinson if he want to pursue beyond his trilogy, if the franchise wants/needs to capitalize on his (hopefully) continued success under the cowl.
From what I'm reading, I feel this may be the plan regarding Batman. I feel like a lot of people don't realize how long it's going to take for this to be put together. Batman, no matter what version, will certainly not cross paths with any other hero in the DC universe for a few years. There's time for options imo.