I have in my hand the latest issue of the Official Xbox Magazine. Inside there are a few things about Halo Wars that you all should know.
Infantry Upgrades- Shotguns, Medics, then later ODSTs
Hornet Upgrades- Quote "Rocket-toting gunners straddling their wings"
Halo Wars has a skirmish mode.
One of the new Multiplayer Maps is a remake of Blood Gultch.
There are skulls in the game. You unlock them bye completing a "Kill Quest" such as kill 100 grunts on the first mission.
With Sgt. Forge you can upgrade scorpians to Grizzly tanks.
New Covenant Vehicle known as the "Vampire" which is a Anti-Air Unit.
When you train one hunter you spawn two of them out of the barracks.