How about a new Batman? Is a new Batman the answer? We think a new Batman is the answer.
Realistically - I would have had Batman take on the Nick Fury role and release WW, Aquaman, then Man of Steel 2, then do Batman V Superman (being a lot different of a movie) as the JL set-up.
Since that's not what they did - a new Batman movie would be the last movie I'd release among the 4 (again, I'd completely kill the Cyborg movie coming out), but I'd be lying if I said it's not piquing my curiosity... Just hope they can keep Affleck. If he leaves, kill the movie completely.