Zack Snyder gives an explanation as to the reasoning behind using Batman in the sequel to Man of Steel, when we might see the costumes and his thoughts on Superman compared to the Christopher Reeve version.
Basically Snyder says who else could they use to take on Superman.
...after Man of Steel finished and we started talking about what would be in the next movie, I started subtly mentioning that it would be cool if he faced Batman. In the first meeting, it was like, “Maybe Batman?” Maybe at the end of the second movie, some Kryptonite gets delivered to Bruce Wayne’s house or something. Like in a cryptic way, that’s the first time we see him. But then, once you say it out loud, right? You’re in a story meeting talking about, like, who should [Superman] fight if he fought this giant alien threat Zod who was basically his equal physically, from his planet, fighting on our turf… You know, who to fight next? The problem is, once you say it out loud, then it’s kind of hard to go back, right? Once you say, “What about Batman?” then you realize, “Okay, that’s a cool idea. What else?” I mean, what do you say after that?
Snyder also offers he doesn't know when the Ben Affleck Batman, Gal Gadot Wonder Woman and tweaked Henry Cavill Superman costumes will be released as it involves other factors such as marketing.
Unfortunately, I don’t even know the timeline… Because the movie takes place so far from now, it’s hard to know exactly. That all gets tied to marketing and strategies for the movie. It’s not just a free-for-all, which I’d love it to be. Because I take a picture of the suit with my camera– I’m actually staring at one right now in my office. And it’s just massive on my wall in my office and it’s epic, let me tell you! And I’m like, “God, I want to send this to the Internet immediately.” But I know I’m not allowed to [laughs]! I do value the sort of excitement of the way the film is [revealed]… the pieces that are released and sort of trickle out to everybody, and those reveals are exciting milestones for us.
Snyder also comments on how people reacted to his Superman in Man of Steel, which he feels is more real than previous versions.
…I think with Superman we have this opportunity to place this icon within the sort of real world we live in. And I think that, honestly, the thing I was surprised about in response to Superman was how everyone clings to the Christopher Reeve version of Superman, you know? How tightly they cling to those ideas, not really the comic book version but more the movie version… If you really analyze the comic book version of Superman, he’s killed, he’s done all the things– I guess the rules that people associate with Superman in the movie world are not the rules that really apply to him in the comic book world, because those rules are different. He’s done all the things and more that we’ve shown him doing, right? It’s just funny to see people really taking it personally… because I made him real, you know, I made him feel, or made consequences [in] the world.
You can read more with Zack Snyder talking Batman Vs. Superman, Watchmen, 300 and Sucker Punch at Forbes.
The untitled "Batman Vs Superman" has a newly announced May 6, 2016 release starring Ben Affleck, Henry Cavill, Gal Gadot, Amy Adams, Laurence Fishburne, Diane Lane, Jeremy Irons, Callan Mulvey, Holly Hunter and Tao Okamoto.
For more news on the "Man of Steel" and related movies head on over to the Cosmic Book News Superman movie hub.