Attempt at realism minus any knowledge of salary cap or availability:
first: No to Villanueva. No to Drew Gooden. And no to Sheed (dangerous combo of charisma and lameness)
yes to Childress, DWEST, Battier, Nene (fantasy), Joe Smith, Anthony Randolph (fantasy for future).
But actually, we may already be nearly set for next year. so unless a miracle trade that can't be turned down shows up:
we need to keep the starting 5 in tact. Next, we need to sign BOTH Powe and Big Baby. With Garnett getting older, these two are two PROVEN players, and both can backup at center in a pinch. Powe equals points, rebounds and energy. Davis equals major energy, passing, smarts, bulk, some points, etc... Davis ceiling is still partly unknown...so let's see where it goes, and Powe is proven. Sign 'em both Danny. If Marbury convinces Celts he'll stay happy at backup all next year, and he's well liked, then sign him again. Steph could get a couple of rings if he'll just stay happy. And that would mean we lucked into something special. Sign Tony Allen again and challenge Walker and Giddens to take playing time from him (could trade Tony if desired once Giddens/Walker is proven at least on defensive end). Sign House again if he's not already. Too many players? Almost, but health of big three must be considered.
I agree we still need our Posey replacement, so if Danny wants to give up on Tony Allen and doesn't think Walker/Giddens is ready, then we may have to trade one of Powe Davis plus something else for a special, veteran small forward. But I wouldn't do that. I'd sign Powe and Davis and give Allen/Giddens/Walker the backup SF task, at least for the first half of next year.