I am expecting Ainge to resign one of Bass or Jerebko. Hopefully Jerebko. Then keep J.Mickey as a fourth string backup PF / third string backup C. Then acquire a more proven center than C.Iverson to either start ahead of Zeller or provide quality backup minutes for Zeller.
I think C.Iverson is competing with J.Mickey for that 3rd string C role and I think Mickey's skill-level, athleticism and versatility will beat out Iverson's superior size.