Michele,
I am coming back with my two little princesses in October, and I am hoping that the answer is YES!
HOWEVER, we really don't know. The opening of the Fantasyland expansion is reported to start in the Spring of 2012, but Disney has made it clear that the openings will come in stages. They are very guarded about sharing that information of exactly what and exactly when (even with us Moms!), and that is probably a good thing. They don't want to over-promise and under-deliver, I would guess.
What I would recommend you do is keep checking the
Disney Parks Blog. It is an official site, and I am guessing that they will announce opening times there. And at first they may not even take reservations. So when you come, even if it is not officially open, you should swing by and check out if they might be working a soft launch for testing purposes.
In the meantime I will keep my fingers crossed for us both!
Have a magical (and delicious) vacation!