Just putting this out there..
http://games.espn.go.com/nba/tradeMachine?tradeId=7wjynr7If this was the trade it wouldn't initially feel right to the celtics fans however if Wallace doesn't pick up his option and looks for a long term deal that puts the Cs 40mill under the cap (based on the 25mill free cap space + pierces 15mill).
With that much $$ the Cs could attempt the following
Rondo+Avery+JJJ+2 Rookies
40 mill free
sign Batum for 12.5 mill (would portland pay more?)
27.5 mill free
sign Eric Gordon for 12.5 mill (would NO aka NBA pay more?)
15 mill free
sign J Green for 6 mill
9 mill free
sign Lopez (or best center available) for 5.5 mill
3.5 mill free
sign Pietrus for 2.5 mill
1 mill free
pick up option on Steimsma for .75 mill (it think)
PLAN B if Batum is unattainable go after R Anderson, If Gordon then go after Mayo
2013 plan A
C : R Lopez(or other FA C), Steimsma,(Rookie)
PF : J Green, JJJ (plan B ryan anderson)
SF : Batum, Pietrus, (Rookie) (plan B J green plays SF)
SG : E Gordon, Avery, (Rookie)(Plan B Mayo)
PG : Rondo,(min vet),(2nd round rookie)
then we just run