This is an opportunity for the Celtics.
Nico traded for Davis, and wasn't going to trade him on principle and ego. Now that he's gone, everything is a possibility.
The Mavs lucked into Flagg. Now they can rebuild around Flagg and his timeline. They already have Gafford and Lively as young bigs that can play next to Flagg.
It makes a lot of sense for the Mavs to start shopping Davis now and look to retool around Flagg. I think it makes sense for them to shop Irving too at some point.
The Celtics could put together a decent trade package for Davis, if he was willing to play for Boston. He's the exact type of player that would fit really well next to Brown and Tatum.
If the Celtics could keep one of Pritchard-White-Simons, along with some of their wings, they could retool more quickly than we previously thought.