343 Industries have confirmed that they have outlined the foundation for Halo 6 alongside Halo 5, speaking of the “fictional foundation” for the franchise laid out for the next 20 years.
“We do kind of know what’s going to happen in the next game pretty well at this point,” explains franchise development director Frank O’Connor. “We’re doing serious real planning and even some writing on the next game already, and that’s a luxury – we’ve never been in that position before. So we both know at a very high level what’s going to happen in, say, ten years from now. But at that very granular level knowing what’s going to happen in the next game and that’s just been a great feeling for me”.
343 has constructed a general plan for where they’re heading in the greater Halo universe after Halo 5 for the foreseeable future and, while that plan is flexible and can change, they have stepping stones that lets them know what will happen in the next game.