Definitely not worried about Gal Gadot. It will be a new take on Wonder Woman. She may even have an Israilian accent.
I didn't care for Bale's Bruce Wayne, he didn't have that occasional cold personality Bruce had in the comics or animated series that Keaton and Conroy portrayed.
Bruce Wayne is a playboy, but Bale's version seemed too happy. He's supposed to be angry and like Scrooge sometimes.
Affleck's voice sound too informal. He looks like a boyscout and sounds like a boyscout too. I just hope he changes his voice. Keaton and Conroy provided good voice as both Batman and Bruce Wayne.
Affleck has the charm, but I also hope he can manage too look tired and weary in his eyes...and eye brows.
I don't want Affleck to sound anything like his normal voice, he needs to tone his voice down to a deeper, darker manly voice.
If he can sound like Conroy or the voice of Batman in Arkham Origins, that would be great.
For Batman, we need to move away for that Bale voice, he could sound like that, but significantly less, but not sound like a southern accent, or old man, but scary is good. Bale's voice was over the top and never consistent with his Batman voice. One minute it sounded quiet and light, then it sounded very loud.