The most recent title in the canon, Cathy Yan’s Birds Of Prey (And The Fantabulous Emancipation Of One Harley Quinn) is a perfect example, as Ewan McGregor’s Roman Sionis a.k.a.
Black Mask is one of the best baddies that we’ve seen so far from these movies.
SPOILER WARNING: The following article contains spoilers of Birds of Prey.
After all, with most of these films the antagonist drives the plot, and so the quality of the antagonist often reflects the quality overall.