I really like to see more story and new Leaders me honestly like to play as Master Chief leader with a army of Spartans from Infinity or Eternity if projected UNSC reinforcements by Isbel.
Of course for story like to see more to Palmer and other survivors on the run and Commander Jerome dispatch on a rescue mission while of course scattered pockets of the Flood and what else out now that the Ark plus the new main base at the Starfighter hanger with a good defense against attacks as one way in and enough guns to prevent ground or air attacks. Still see so much more in the Second Ark Conflict plus who was the one to bring Spirit here is Forge the new Monitor or Johnson given Spirit of Fire sublight course could be in range of the old shield world slip space systems the Ark remote access and transported and closest asset to transport to fight the Banish.
Or the fall of the outpost too Atriox Fleet.
Plus Atriox new offensive planned to strike our positions as unlike before after Spearbreaker we have a fix position to defend and a good one plus bring back some HW1 stuff as proper time to build.
Of course Boomerang running around keeping the enemy off balance plus there Alice make a excellent commander opening a second front with Douglas on defense duty at the Outpost. With Jerome on QRF duty following Spearbreaker the need to multi task and break up into Commanders to cover various fronts at once.
But that just me. Me hoping new wave of DLCs even if not must have more.