Buried within this article about Torre is the the news that the Yanks are moving Joba to the rotation next year:
"The only thing that's been decided, that we all agree on, is that (Joba) Chamberlain and (Phil) Hughes start out spring training as starters. Our pitching has got to be better next year, the starting rotation." -Hank Steinbrenner
So we're starting off with a rotation of Wang, Hughes, and Joba. That leaves two spots for Pettitte, Moose, Kennedy, and Igawa. We also have one more top pitching prospect that could force his way into the equation by midyear (Alan Horne).
Ideally, Pettitte comes back for one more year, Igawa is moved to the bullpen, and Moose is put out to pasture so that Kennedy can grab the 5 slot.
Hopefully this means Humberto Sanchez will be moved to the bullpen to setup for Mo (I'm not even considering the possibility that he's pitching elsewhere, for the sake of my sanity).
Then we have plenty of organizational depth should any of the starters get hurt (Clippard, Karstens, Wright, Rasner, DeSalvo, etc.).
So considering the Yanks scored more runs this year than any season since the 40's, and they really don't need to do much to bolster the pitching staff, ideally they will focus their offseason efforts on not losing too much offense (i.e. A-Rod, Abreu, and Posada).