If no major free agents, I think they'll try to trade for Hibbert or else try to sign Robin Lopez, Kosta Koufos, or Bismack Biyombo.
Beyond that, make a trade or two to prune the roster a bit, and then head into next season ready to find out what some of the younger players can do. Probably with a roster that looks like it'll compete for a bottom 10 record, but might surprise again.