the release date is "when it's done" ...
I guess it'll be around beginning of next year.
The exact new features / changes are still not sure.
But here the main lines :
1- 3D players (sure at 99%)
2- even more realistic ball trajectories : if you have a close look at TE2006, you'll see that very slow ball (ie: drop shot) and very fast ball (ie: service) don't have a true realistic trajectory, and I want to change that
3- new AI : it should allow to give a play style to AI players, to give more variety in your opponents, and emulate (a bit) the play style of some real players
4- improved gameplay : the feelings should still be the same, but I'll probably add a short crossed acceleration, more variety in the ball trajectories on every shot, and the positioning of your player will affect the way you hit in the ball (I'm not sure exactly how right now) ; and probably a new service
The court will be still in 2D, to keep this 2D feeling, easy to read, and doesn't need a big PC to play the game...
No change planned in the World Tour...