User blog comment:Kaloneous/Mass Effect 3 Ending DLC Denied and PAX/@comment-4916217-20120316175100/@comment-743796-20120317040446

Regarding Halo... it was indeed true that Bungie intended to have Halo 3 end Master Chief's story, but once the rights were given to 343 Industries, the latter company decided to "undo" that decision, and make Halo 4.