It's safe to say that people pretty much enjoyed X-Men: First Class. The movie had a reported budget of $160 million and has grossed $353,624,124 worldwide. It's long been reported that a sequel would be made. It's also been reported that Fox and director Matthew Vaughn agreed to begin filming in January 2013 in order to allow Jennifer Lawrence to film The Hunger Games: Catching Fire. Lawrence will be returning as Mystique along with James McAvoy, Michael Fassbender, January Jones, Caleb Landry Jones, Nicholas Hoult and Lucas Till.
Fox has announced that the untitled sequel will be released on July 18, 2014. Looks like they're betting on it being one of their summer tentpole releases. It's an ambitious release date. You have to wonder what else will be released at that time. It's also around San Diego Comic-Con.
As for other comic book movies in 2014, we know Captain America 2 will be released on April 4, 2014 and Marvel will have another untitled/unannounced movie on May 16, 2014. Sony is tentatively planning on releasing a sequel to The Amazing Spider-Man on May 5, 2014. Will Warner Bros/DC Entertainment have anything coming in 2014?