Does anyone know how many films Amy Adams has left on her contract? Just for arguments sake, if they can't get her back (I'd like to see the wedding myself) I think it'd be cool to see Superman do something we've never seen in a movie - go to the future. Booster Gold would be easier to introduce in a film than the Legion imo...maybe Booster brings Superman on an adventure to save the future. It would also alleviate the issue of trying to tie it into the other DCEU films, assuming WB wants to go the route of less connectivity without rebooting.
Side note: John Krasinski as Booster & Rainn Wilson as Skeets, please.