Share this: These aren’t your grandfather’s Boston Celtics. Scratch that — as far as familiar lineups go, these aren’t anyone’s Celtics. Boston entered the summer with the potential for a roster overhaul, and that’s exactly what we’ve gotten: Avery Bradley, Kelly Olynyk and other ancillary pieces from the Celtics’ 2016-17 club are out the door, making room for Gordon Hayward, Marcus Morris, Aron Baynes and four draft picks, highlighted by No. 3 overall selection Jayson Tatum. We still don’t know if president of basketball operations Danny Ainge has more roster moves in store. For the most part, though, the major work is done. That begs the question: What will this team look like in the 2017-18 season? It’s a simple question with a very