AH2 isn't going to include TOD - the mission theatre. So the flight models will be different perhaps, the gunnery is likely to be different...
...but the gameplay is going to be SOSO - same old, same old. It will still be grab-the-best-plane-for-the-job, it will still be the übertrio, gangbangs, hording, suicide-the-CV, pork-n-auger...
Of course, a lot of the old game-the-game tricks may well not work, so we'll see a different pattern to the gameplay. But I've not seen anything to indicate that the underlying theme will be any different from SOSO.
So as far as I'm concerned, I don't care when AH2 comes out.
TOD seems like a good concept, but I have reservations about how many will play it. Most are probably going to be happy in the MA paddling pool.