I was actually thinking of something along the lines of this when the trade went down. I don't think Smart should be included in the deal, as we wouldn't be getting nearly enough back in return. (PS I am not one of the people who overvalue smart. He just at this point has more trade value than Hibbert who 29 other teams in the league know is heading towards a divorce with Indy.)
I also viewed Turner as the target, not Hibbert. With the opting out of West, Indiana now has holes all over their roster, and the building block is still there. I know the Celtics brass appears to be high on Rozier, it just seemed like Rozier fits the exact kind of player the Pacers love. This led me to a conclusion that Rozier/Sully for Turner wouldn't be the worst idea ever for both teams. If Sully keeps playing that mid-range/prayer 3 style player, he could fit next to Hibbert without too many problems. Sully's ceiling could be something like a new age version of David West.
However, if we work off the assumption Rozier isn't going to be flipped (based on Celtics chatter), then he could be the heir apparent for Bradley's role on the Celtics. You sub Bradley into the above trade for Rozier, it could look something like this.
Bradley/Sully <---> Turner/ (heavily lottery protected future 1st or something like 2nds, because Danny loves 2nd rounders)
New lineup for the Celtics is something like
PG- IT/Rozier (don't know if IT is committed to coming off the bench for a reach rookie)
SG- Smart/Hunter
SF-Crowder/Young (high hopes for Young this year man)
PF- Kelly at his natural position/Mickey (would get a chance to wow us)
C-Zeller/Turner