The first trailer has finally been released. From the initial viewing, it seems Cheetah is being built up as future antagonist for Diana (perhaps in another movie rather than adding her in the third act). And since the DCEU is not going to be as connected as it was prior to Justice League, I doubt the main villain is the New God, Glorious Godfrey, even though you may get that impression when you first see him.
However I wonder if that shot of a wall being destroyed is meant to be a political jab that is too on the nose.