I would love it if they at least added the Revenant and the Spectre. I love the Revenant in halo reach and the Spectre just seems amazing. Now I do not want the Revenant that was cut from halo 4, that was basically a Specrte. Halo 4 was lacking in covenant vehicles as there was only 3. Their definitely needs to be more covenant vehicles in halo 5. I do not want to see a new covenant vehicle in halo 5 instead of a return of a return of previous vehicles. Here is a list of vehicles that I would like to see return:
UNSC:
Sparrowhawk (also simply called the "Hawk" for short)
Hornet
Falcon
Kestrel (was in Halo: Spartan Strike)
Vulture
Troop Hog (a warthog troop transport variant)
Wolverine (an anti air tank to help balance all the air vehicles)
Rhino (the plasma tank from Halo Wars)
Cobra (an anti vehicle mini tank to balance the large number of vehicles)
Covenant:
Vampire
Revenant
Spectre
Chopper
Locust (a mini scarab that would be a good counter to the Mantis)
AA Wraith (the Anti Air wraith is the Covenant counterpart to the Wolverine)
I know that 343 can't add all of them, but at lease add as many as you can and make the vehicles that were only in 1 game more important to add. Halo 5 also needs at lease 1 UNSC flying vehicle.