That's why they made Suicide Squad, and the next two solos are about Aquaman, the fish guy, and Captain Marvel, who is so popular he doesn't even show up in comics.![]()
They used Joker for advertising and had Batman cameo.
As for Aquaman and Shazam, it shows they're FINALLY starting to learn their lesson...40 years in.
Marvel does not have 3 characters as popular as Supderman, Batman, and Wonder Woman. At least not ones they had rights to when the MCU was launched.
That's why they decided "Hey, why don't we make good movies and make our B and C listers into A Listers?"