I believe that after the astronomic success of Joker, a dark, adult and low budget movie, the super-hero genre will change forever. I think that after this movies we will get different takes on less known characters with a more adult, and a more "cinephile" take. The Joker movie was very inspired in Scorsese, now imagine for example a Question movie with a Hitchcock "taste", or a Deathstroke movie with Tarantino traces, imagine less known characters and villains getting low budget movies but with great quality. Deadman, Riddler, Two-Face, Lex Luthor can be getting movies with more authorial takes.