I have been looking around and asking. Have they announced when the “DLC” is going to be released? I know in the past it has been on Tuesdays, just want to make sure my xbox is updated before i get home 
No Halo 5 DLC thus far has had a definitive release date, likely because of Microsoft’s content certification process. It can take a day or it can take a week, it all depends.
Wednesday after the Reveal Stream. It’s been like that for the rest of the updates, and this one probably won’t be any different. Just assume that it will always be the Wednesday after the Stream.