Shortly after they announced that Matt Reeves will direct The Batman, Warner Bros told The Hollywood Reporter that they are planning to do a Nightwing solo movie with Lego Batman director, Chris McKay.
Nightwing aka Dick Grayson, perhaps even better known as the first Robin, hasn’t featured in a live-action film since 1997 Batman & Robin, where he was potrayed by Chris O’Donnell.
He would be the first Robin (in this case, former Robin) to be introduced to the DCEU. With only hint towards any Robin so far being the suit of the Robin who the Joker killed (BvS).
This would also open up a bigger possibility of Nightwing appearing in other DCEU movies, such as The Batman or Suicide Squad sequel.