Yeah, even on Miami you had Wade and Joel Anthony (and Chalmers for one start) who had played together the year before. Even on Cleveland you had Delly and Shump and TT (and Kyrie for one start) who had played together already. I can't think of a year where literally NO ONE in the starting five had shared the court before the year started. That's wild when you think of what it takes to create that scenario.
Technically, Rondo, LeBron, McGee, Kuz, and KCP were here last year.