Michael Uslan, who has been a producer on every Batman movie, told USA Today: "On Saturday October 10 we plan on making a major announcement. Stay tuned. Join us at 1:45 p.m. in one of the large rooms. You won't want to miss what's going to take place there."
More than likely the large room Uslan is talking about is the "Batman: The Bat Universe" panel, which takes place that same Saturday on the Empire Stage at the NYCC Javits Center. Here is the official description:
A veritable who’s who of Bat-talent will gather together in Gotham for “DC Comics – Batman: The Bat-Universe.” Explore the latest adventures of the World’s Greatest Detective with Scott Snyder and Greg Capullo (BATMAN), Amy Chu (POISON IVY: CYCLE OF LIFE AND DEATH), Khary Randolph (WE ARE ROBIN), Tom King and Tim Seeley (GRAYSON), Peter Tomasi (BATMAN: ARKHAM KNIGHT), and James Tynion IV (BATMAN ETERNAL), and be the first to witness never-before-seen art and breaking Batman news. Saturday, 1:30 pm, Empire Stage 1E.
It's pure speculation, but Uslan may be talking about the standalone Ben Affleck Batman movie that has recently been rumored. Affleck has been said to be attached to three Batman movies in which he will star and direct.
Of course, the announcement could be about a number of things as Uslan is also involved with Batman Vs. Superman. It's possible the news could be Justice League related or about another DC movie.
"Batman v Superman: Dawn of Justice" has a March 25, 2016 release starring Ben Affleck as Batman, Henry Cavill as Superman, Gal Gadot as Wonder Woman, Amy Adams as Lois Lane, Laurence Fishburne as Perry White, Diane Lane as Martha Kent, Jeremy Irons as Alfred, Jesse Eisenberg as Lex Luthor, Ray Fisher as Cyborg with Callan Mulvey, Holly Hunter as Senator Finch and Tao Okamoto as Mercy Graves. Justice League is to follow directed by Zack Snyder as well.
Fearing the actions of a god-like Super Hero left unchecked, Gotham City’s own formidable, forceful vigilante takes on Metropolis’s most revered, modern-day savior, while the world wrestles with what sort of hero it really needs. And with Batman and Superman at war with one another, a new threat quickly arises, putting mankind in greater danger than it’s ever known before.
Batman Vs. Superman Comic-Con Trailer: