If you were in the previous flight, if you select it again from My Games and Apps on your Xbox you can get it to update now. All you can do is go on the menu for now and listen to the music while you wait for the flight to go live.
Made your first hot drop into HaloWaypoint.com
Halo 4 Campaign Easter Egg
Halo 5: Guardians MP Beta participant.
View your Service Record on the web.
Become a member of an active Spartan Company.