With the return of Shaquille & Jermaine O'Neal, the Celtics will have an overstacked roster...how are they going to handle things?  They can only dress 12 guys, correct? (Unless something changed)

So does Shaq start instead of Nenad?  What happens to the second unit then?  Does Troy Murphy get bumped in place of Shaq/Nenad?  If so, that seriously changes the dynamic of that unit because it removes an inside/outside presence and just goes to a double inside with N/S & Baby.  

And where does Jermaine fit into all this?  Seems like he's the odd man out in my opinion...and Sasha...what's his role, if any?

These seem like they are good problems to have for any team but finding the right starting combination and then the right five guys off the bench is going to be a tricky thing to do and there isn't much time to do that.