I think its going to be a struggle to fit so many characters into the one movie but i doing think the casting has been brilliantly done.
Henry Cavill is no Christopher Reeve but I think he was a great Superman in Man Of Steel. (a movie that get so much hate and I can't understand why as I loved it)
Ben Affleck was a controversial choice though so was Michael Keaton (my fav Batman) and Heath Ledger when they were cast for their respective roles in previous movies. Affleck in all the pics and clips I've seen of him seems to of nailed it and could well be the best on screen depiction of the character we have seen yet.
Jeromy Irons is a no brainer when it comes to Alfred as he just oozes class and is a terrific actor so the only question marks are for me is Jessie Eissenberg as Luthor maybe Gal Godot as Wonder Woman as I've never seen her act though despite being small in stature looks to have the image down well and the choice as Doomsday as the villain as I think they could maybe saved that for the Justice League.
I really hopes this film does well as im a big fan of both characters and really want their Universe to get the respect it deserves as Marvel are away ahead in that regard despite only a handful of their films actually being good.
- - - Updated - - -
Yeah the dark knight was enjoyable.
Tim Burton's Batman is my favourite with the Dark Knight coming second.