Im actually pretty conflicted. Affleck is much better then he's usually given credit for, but I dont know if he can bring the gravity to this particular role.
It's funny because Batman is supposed to be the brooding asshole and Superman the charismatic fun guy, yet Henry Cavill has the charisma of a fish while Ben Affleck can be charismatic.
From the report linked a page ago, it sounds like theyre looking at playing up the billionaire playboy side of Bruce Wayne, so that probably would have been a big factor in casting someone like Affleck.
I used to live in Idaho, and went to an aircraft museum. Inside said museum is the exact P-40 Warhawk used in Pearl Harbor. The owner of said Warhawk would tell people how much of a dick Ben Affleck is. So I'm a bit biased against said actor.
Bryan Cranston as Lex Luthor is something I simply disagree with, I've always envisioned Luthor has being in his later thirties to early forties, charismatic, cultured and deeply methodical.
Cranston is fantastic, but he just doesn't embody that for me.