https://soundcloud.com/empiremagazine/batman-v-superman-spoiler-special-with-zack-snyder-charles-roven-deborah-snyder
Henry Cavill And Zack Snyder On Chances Of Another Standalone SUPERMAN Movie
TL;DR:
"I didn't feel the need to explain how Lex figured out Batman and Superman's secret identities because the concept of secret identities is ridiculous."
"I kinda came to the conclusion also that they couldn't really talk in their suits, um, with any credibility..."
"... more than 4 or 5 lines and you start to notice, like wait, these are two guys ... one guys dressed up like a bat and the other has a big red 'S' on his chest, and they're being super serious about how mad they are at each other..."
"I think if we can get a good script, it would be great to get a standalone Superman movie. I think that would be fun to do...Part of the reason we didn't announce a standalone superhero movie is to support some of the event of [Batman v Superman]. "
"I do believe it depends on the success of this movie. If this goes well then we can start to negotiate with Warner Bros. for a standalone Superman movie. But they've got their plans set out for other stuff and Justice Leagues and various other movies, so it's about finding the time, really. It's something that I would be very keen to do."
"We're in the process of looking at that, but we don't have it on the schedule at the moment because we're quite busy with the movies that we have scheduled."