343 Industries recently had this to say about the future of the Halo Universe...
"As we said prior to the launch of “Halo 4” last year, we have a long-term vision for the future of the “Halo” universe and are excited to tell many stories in a variety of ways, such as Spartan Ops and games on other devices like “Halo: Spartan Assault,” so we don’t want to limit our plans to a trilogy. Our ambitions for the franchise are even broader than that, although the core story of the Master Chief and the Reclaimer Saga is still being approached with a classic narrative approach, with a beginning, a middle and an end. We simply have more storytelling tools at our disposal now.

 Halo 4 was originally the kick-start to the Halo 'Reclaimer Trilogy'.

 Phil Spencer of Microsoft Studios stated -
"While we originally said trilogy, we've actually expanded this to more of a saga," Spencer told GameSpot, "so we don't want to limit the Reclaimer story within a trilogy." Spencer declined to specify whether the Xbox One Halo title was Halo 5 proper or a spinoff of sorts, opting instead to say that it's "a legitimate version of Halo" Microsoft will detail in the future.


This is fantastic news for Halo fans around the world, as this shows us how much hard work and dedication is being put in for the future of Halo, I've always believed in the vision 343 Industries have for the franchise, I'm sure we are in for a ride like no other, and  by the looks of it, this is just the beginning Spartans...