well, if any kind of change in the story line will make it a new halo game. but you never know determining if they want it that way. So this makes it to were we have to wait till it comes out to see if it has changed. or find leaked video on youtube or other cites that are following the halo nation. most leaked videos come from a halo cite witch finds its way to youtube, so the fastest way would be youtube to find out if it has changed or not.