Going off Margot Robbie’s comments, it seems that Birds of Prey will be the first theatrical R-rated DCEU film.
The Birds of Prey movie just might become the DCEU’s first R-rated theatrical release.
Since there’s only one Harley Quinn, it remains to be seen which Harley-centered movie will enter production first: Birds of Prey or Suicide Squad 2.
One of the chief complaints of 2016’s Suicide Squad film was that it was PG-13 when it clearly should’ve been rated R. If Birds of Prey releases as an R-rated movie and is successful, then that might pave the way for Suicide Squad 2 to also be rated R. But we’ll just have to wait and see what happens on that front.