Like...?
People are speculating what miniscule entry Aquaman is going to get, probably a side notion or teaser at the end, other than that the movie is already full.
Funny, I saw the exact opposite argument when people were talking about an old Batman. And the thing is, Lex Luthor as I know him, did already build robots even without Superman around. The Lex I like is the Lex that was born at the deep end of the social hierachy. A man that was fighting himself up to the top with his intellect. Not some teenage brat genius. And I don't believe in character development, because I don't believe that Jeese Eisenberg can play anyone else than Jeese Eisernberg.
You know what I dreamed of, when I didn't have wet dreams? I dreamed of a movie called "Luthor" starring Brian Cranston, showing how he managed his childhood, his growing fame and appreciation of others of his abilities. Of him seeing himself as the "Superman" that would elevate mankind until at some point MoS interjects and his downfall begins. Partly due xenophiba, partly due jealousy that they call someone superman who isn't a (hu)man, a title he thought belonged in his hands. This would've been something that DC could've used against Marvel as something fresh. The superheroes from the viewpoint of the villains, characterizing them indirectly and developing and humanizing the villains. Suicide Squad goes partly in that direction, but only partly.