Even though it's 343, I think an ODST sequel would be the perfect way to retain the classic Halo feel, as the the ODST's help keep the gameplay grounded in realism rather than the dudebro stupidity of the Crysis-wannabe Halo 5 Spartans...

Heck, since it would no doubt be outsourced, there's a chance it would be good...

Wish 343 would give us a hint that ODSTs are still people too, as the focus shift towards S4s gave off the impression that the ODST were now an irrelevant service... Last thing I want is to see Buck in an S4 wetsuit...