fomr all the info gathered on the net, and listening to HT and Pyro at the con....
ToD will be stand alone, not part of AHII. it will be it's own seperate entity.
ToD will be a mission based simulator. there will be no lone wolf, and you will not just take off whenever you want.
you will have to go through training, then work your way up.
mission objective will be more important than individual accomplishment... IE you get 5 kills, but mission fails and you are the only plane to survive... you lose points or whatever.
it will be possible to fly and not contact an enemy (possibly).
there will be no "base capture" as we know it.
the higher in rank you get the better ground crew you will have, meaning more reliable plane.
thats all i can think to remember right now, but that gives you the basics.