I feel thats what's coming next.
CoD staggers its games. MW one year, BO the next.
I feel M$ will do the same with Halo now.
CE remake, Halo 4, Halo 2 remake,
--> Next gen console.
Halo 5, Halo 3 remake, Halo 6
That way each of the original trilogy gets remade on a new platform.
This is only my opinion.