If 343 does not port this to the MCC, the only way we can play this is back on the Xbox 360 version (plus the Co-op online experience now on back on ODST is not the best anymore). Keep in mind its not guaranteed forever we will have backwards compatibility on the next gen system even on Xbox Scarlett going forward after to play 360 games on this. I think it would be foolish for 343 not to do this to add all the upgrades they did to ODST on MCC already! And plus the development time would not take a long time since the engine is already for the campaign in the MCC (plus theater mode) so a single mode with 8 maps would take hardly anymore time compared to porting a full game like Reach. With the new armor customization menu coming with the Unreal Engine, it would not take too much more resources to show the voice/head models when changing your character for ODST firefight (however they are already having memory issues with UE4 unfortunately fitting Halo Reach on the Original Xbox One version at the moment so we'll see if adding this would be so overkill then).