[Cyberbob]

I didn't give a crap about the characters Thor, Iron-Man, Black Widow, and Hawkeye, when Marvel made the MCU. If it wasn't X-Men or Spider-Man, I didn't want to know.
They did an amazing job at taking B-grade heroes and making people care about them.

James Gunn took that and ran with it. He made people care about Guardians of the Galaxy, Suicide Squad, and now Peacemaker.

I think he'll follow that formula. Leave Superman and Batman alone for a bit.
He'll flesh out something obscure like the Doom Patrol or Infinity Inc for the big screen and he'll smash it.