There is a black Green Lantern named John Stewart, he's mostly know for being the Green Lantern in the Justice League cartoons. Since the GL Corps is an extremely diverse organization with 700+ members, it's not a problem introducing a new reimagining as long as your not needlessly changing for change's sake.
I'm assuming Aquaman is supposed to be Polynesian, guessing because of their reputation as seafarers. Doesn't make too much sense since he's Atlantean which is always been portrayed as Greek. No idea what's up with the blonde hair though, although you could say the same thing about the original too.
Green guy I'm assuming is Martian Manhunter, no idea why they made him so lanky or gave him a suit.
I'm pretty sure "Nightwing" is either supposed to be Batman or some weird combination between Batman and Nightwing. He has Nightwing's colors and escrima sticks, but he has a cowl and cape like Batman (Dick hated both and intentionally didn't have either when designing his own costume), plus Batman makes alot more sense than NW in a group photo of the main Justice League guys.
No idea why the Flash is a woman other than for the sake of pandering.
No idea what's going on with Superman and Wonder Woman other than the fact they're bad designs.
Also like how Cyborg, a black superhero is left out of the picture, despite being a charter member of the Justice League after the New 52 reboot. I guess because it'd be racist if you'd change him.