I think it'd be much better if the Celtics signed Duncan instead.
It's not happening. KG has too much invested in Boston and is so close to the end a move wouldn't make sense unless the Spurs blow the Celtics out of the water with the money offered (don't see that happening).
The only thing that would make sense is if Ainge did a sign and trade (with KGs permission) for Green and Ginobli.
Even then, that would leave us completely bone dry in big men who could rebound and Ainge would have to some other deal lined up to get at least two quality rebounding bigs.
KG sign and trade for Green + Ginobli
JJJ + 21 + Ray sign and trade for Joakhim Noah
Rondo / Dooling / Moore
Bradley / Ginobli / Green
Pierce / Jeff Green / Green
Bass / Wilcox
Noah / Stiemsma / Hollins
Season after. Pierce retires. Bass/Wilcox walk for more money elsewhere. Dooling retires. Resign Jeff
Rondo / Moore
Bradley / Ginobli
Jeff Green/ Green
Josh Smith
Noah / Stiemsma / Hollins
Fill in the rest with role players and the MLE.
Obviously unlikely, but a fun exercise of fantasy GM.