A Superman and Batman crossover movie is in development, according to the Los Angeles Times, and Warner Bros appears poised to blow Comic-Con out of the water today when they make the official announcement at their Hall H panel at Comic-Con 2013.

The crossover will be the follow-up to Man of Steel starring Henry Cavill which hit theaters in June. Cavill will reprise his role as Superman, and director Zack Snyder and writer David S. Goyer will be included in the project which is planned for a 2015 release date.

Update: Warner Bros. has confirmed the news. Director Zack Snyder commented on the the film saying, “I’m so excited to begin working again with Henry Cavill in the world we created, and I can’t wait to expand the DC Universe in this next chapter. Let’s face it, it’s beyond mythological to have Superman and our new Batman facing off, since they are the greatest Super Heroes in the world.”

The film will reportedly be called World’s Finest, and some footage was shown which ended with the official logo seen here:

After Man of Steel pulled in $620 million earlier this year, it was also announced that director Zack Snyder and writer David S. Goyer would be focusing on a Man of Steel sequel. This crossover film is most likely what’s next.

It’s possible that Warner Bros. may have decided to focus on Batman and Superman teaming up in the sequel, but that brings up the massive question: Who will be cast as Bruce Wayne? We’ve heard nothing solid at all about the recasting of Batman. The only thing we know for certain is that Christian Bale will not reprise his role as Batman.

Earlier this month, Christian Bale himself said that he would not be reprising his role as Bruce Wayne, as he had a very close relationship with director Chris Nolan and said that he would not be interested in playing Batman in a Justice League film. Now, this crossover isn’t a Justice League film, but it sadly remains true that Bale will not be donning the cowl again.

Many fans wanted Joseph Gordon-levitt to play Batman, after the ending of The Dark Knight Rises pointed at him taking up the reigns, but he’s continued to say that director Christopher Nolan always intended on his Dark Knight trilogy ending the way it did and that it would be up to Nolan as to whether Joseph would play Batman.

These will be the biggest questions that will be asked during Warner Bros.’ Hall H panel, which will be held at Comic-Con shortly. We’ll make sure to update this post as official news comes from the Comic-Con panel. We may not get all the answers today, but we’ll most likely hear about a release date, as well as who will be directing/writing.

Today’s a big day at Comic-Con for numerous reasons. In addition to this surprise announcement, Fox and Marvel may have huge surprises at their panels (but since they’re not confirmed we’re avoiding telling you about them for now). Catching Fire will also have a huge presence with the unveiling of their second trailer.

Stay tuned!

Thanks, Jeremy, @Kristapley, and LA Times.