I think they will replace Bass with Sully. The C's had a hard time rebounding the ball against the the Cavs bigs, so inserting our best rebounder would make sense.
I would need to see some lineup data to confirm this but I think our best 5 production wise in this series has been KO, Sully, Crowder, Smart, Thomas. Which is pretty interesting considering that would be 4 new starters.