On line talk is that JL2 will have the Legion of Doom as the main antagonists.
So how do will build that up?
We have the evil/criminal Lex Luther.
We have Sinestro from the GL film some still won’t accept (aka Deadpool trolling).
We have Black Mantra from Aquaman film.
We will now get Cheetah from WW84.
Riddler and Scarecrow we have seen in several incarnations.
Gorilla Grodd could be in a Flash film.
Brainic could be in Man of Steel 2.
Giganta could be in the third wonder woman film.
The pieces are all there.