If they wanted to make use of a black villain so bad, then they should have went with black manta or black adam. He's basically black batman with a villain origin story. Changing lex luthor into a black man doesn't sit well with me for a few reasons. One being the hero is still white, there's no way getting around that. If this were black superman vs black luthor, I'd be ok with it. As talented an actor as denzel washington is, he shouldn't have to play the bad guy to get the nod. I love training day and I like the wire, but don't you think it's a little bit odd that so many white fan boys are open to the thought of a black villain but a black or hispanic flash freaks them the fukk out? That shyt is messed up when you think about. I remember when a bunch of white fanboys were upset that topher grace was cast as venom in the spiderman movie awhile back. They swore venom was a nikka. They complained he was too "white" for the role, no kidding. This is what they think of us.
White boys only giving us villain and supporting roles. Hell, Sam Jack's Nick Fury played second fiddle to the all white avengers. Outside of assembling the team, what did he do really? Nikka was Ma'Ti status.
That to me is a sideways the way they view black folks. Someone in the comments section articulated this point well.
It wouldn't make sense to put Black Adam or Black Manta in Superman vs. Batman considering neither Shazam nor Aquaman will be in it.