The last Superman movie, "Man of Steel", was fantastic. I saw it twice in IMAX and watched it 2 more times on Blu ray. I Director Zak Snyder is a great filmmaker so I have high hopes for this movie. Ben Affleck is a good actor, but I think I will miss Cristian Bale as Batman.
Batman and Lex Luthor should naturally be a part of this movie. In Man of Steel, they hinted that Batman would make an appearance once, and that Lex Luthor would make an appearance twice. If you missed it, you weren't paying attention.
Glad to see Wonder Woman too, though not sure how she fits into this story yet. Maybe her character is more of an intro and she will be in her own movie next.