Warner Bros. is developing a movie about the origin story for The Joker that will not be part of the DC Extended Universe.
The question still remains why they would launch this idea with a Joker film that is already being criticized.
The studio has no intentions on stopping the DCEU or its lineup, and has several projects currently in development with release dates staked out till 2020.
WB is only a few years into launching the DCEU and has done so to varying levels of success.