Didn't they release ODST already?
Sigh. MCC is not perfect but it's a perfectly playable state and works as intended. It still has hiccups that could be straightened out in patching, but for the most part you can play SP and MP just fine.
Halo 5 ain't launching like the laughable mess TMCC was. It's a mainline game made in-house at 343i. Halo 4 was fine and had no problems. TMCC was made across many different devs and tied together pieces from different games and different iterations of the Halo engine. Not excusing what a shitshow it was, but Halo 5 logically should not suffer the same fate.