Spoilers
So to prevent confusion, my guess is that:
a. they'll mention the mission to Sunagakure
b. Kakashi will get Sakura and Naruto prepared
c. Sakura and Naruto go off to get their stuff ready
d. camera focuses on Kakashi either looking at the gravestone or the picture of his team when he was a genin
e. Kakashi Gaiden
Sounds legitamate, right?
That sounds good to me.. Hope it's something like that.. A nice flashback.