Lets leave some stones unturned...
In my opinion Birds of Prey is a bad idea. The whole of girls beating up guys and whatever else died back in the days of Xena. And I seriously doubt there's anyone in Hollywood who would be able to write decent female characters. Also one "slutty" character and it spoils the bunch - and everybody knows there can't be a movie without fan service.
Also Black Panther. This character hardly makes sense even in the comic books. I mean clearly we can see what Marvel was trying to create with this character. And even though he's a king I can't seem to see him as a lead. "Ironman meets Blood Diamond"... WTF!
They'd have to name a Shazam movie something besides Shazam. The name is crap and it stinks of disaster.