Where are Green Lantern and Martian Manhunter?

GL is missing actually cause they are going to do right and give THEM a proper introduction with a GL Corps movie starring an veteran Hal Jordan and a rookie John Stewart.

Martain Manhunter is missing cause they are going with a New52 inspired League where he is out and Cyborg is in as a founding member.

There's a reference to Green Lantern (nout ours, but the Lantern Corp) in the newest trailer.

Martian Manhunter is too esoteric to be introduced without an origin movie. It would be like Vision in Age of Ultron where people are like "Wait what, who is he, what he is?".

c'mon, it is hard enough for them to make their "better" characters work in movies, let's not get ahead of ourselves.