You've got something to look forward to. This game is awesome.
Word of advice for MP, though: Don't play as Support. It's tempting because you get the juicy Heavy Artillery, but playing Support also means you have to juggle repair tanks, anti-aircraft tanks, and Light Artillery. It's the most challenging role in the whole game by far.
Also, don't go Air if there's already as many Air players as there are Infantry and Armour players. Infantry and Armour should each outnumber Air. For example, if there are 2 Infantry, 1 Armour, and 1 Air, go Armour. Armour, along with Infantry, should make up the majority of your team as they can both fight on their own and take control circles. Air can't take control circles, and Support can't fight on the front-line as it is, after all, there to Support the ones who do.
I'm so looking forward to SP myself as I haven't played any besides the tutorial in the demo.
Demo comes out today! Yay! 
"One of the bitches actually gave birth while she was attacking, and her puppies joined in on the carnage."
--the awesomeness that is Boatmurdered.