Apparently, director Matt Reeves is confirmed to be looking for actors to fill the roles of Catwoman, the Penguin, Firefly, and the Riddler for his upcoming solo Batman movie, starring ‘High Life’ star Robert Pattinson as Batman (likely a younger version than in BvS and JL).
Normally such a big roster of villains would make me nervous, as the Spider-Man movies tried and failed twice to make it work. But The Batman (which is the movie's current working title) has been reported that it'll be more of a detective noir rather than action blockbuster, and in that case I think multiple villains/antagonists can work just fine. Even just a simple "Who done it?" murder mystery could work great for a Batman movie and justify multiple villains without shafting any of them.