https://wccftech.com/halo-5-isnt-getting-properly-xbox-series-x-enhanced-though-itll-load-faster/

Halo 5 won't be properly enhanced for the Xbox Series S and X, 343 Industries confirmed in a lengthy blog post published yesterday. However, there'll still be some benefits for running the game on the next-generation consoles instead of the current ones.

Shifting gears a bit, after we announced the enhancements that MCC would be getting on the Xbox Series X|S, we did see questions rolling in about how Halo 5 would play on the new consoles. While Halo 5 is not getting the same optimizations for Xbox Series X and Series S as MCC, owners of the next-gen hardware are still going to see the benefits of faster load times and consistently higher resolution gameplay.