Gearbox may be handling Halo 4, Variety's Ben Fritz reports that his source close to the dev confirms that it "has definitely had conversations with Microsoft about doing a new Halo game and is very excited at the prospect," but that "there was no deal in place." For those who might not remember, Gearbox has a history with the Halo franchise, having handled the PC version of the original game.
Fritz reckons it's "quite possible" Gearbox will helm a new Halo project ... it's just "not a certainty yet." If it happens, that would make at least four Halo-related titles in the works: Halo Wars; the Halo game that Bungie was supposed to reveal at E3; Peter Jackson's interactive take on the Halo universe; and whatever Gearbox may or may not be crafting. Given that OXM's rumor regarding Halo 4 as a launch title for 360's successor (if there even is one), we should expect to hear something official either way in, oh, the next year or two.