Bummer on two fronts.
(1) The obvious one. The loss of a great player and to a career threatening injury at that. That will likely hurt his defense and quick drives / spin moves on offense. Cousins is so skilled that he will still be a 20+ppg threat after the injury but I worry about his defense and his efficiency will likely take a drop from the loss of some of those easy baskets off of drives.
(2) Now the NOP can fool themselves into thinking that the Davis-Cousins partnership can still be a success. They won't have the failure of a playoff run to show up their foolish ideas. So they will continue to believe and continue to keep Davis-Cousins together for another year or more. I cannot see them trading Davis this summer or next year's trade deadline. I think it will be summer 2019 or 2020 at the earliest that Davis is becomes available on the trade market.
On a side note, I don't think Cousins will be hurting for contract offers this summer. Heck, they gave Gilbert Arenas a max deal. They gave Elton Brand a max deal. Now the max deals are shorter and have less risk. Cousins will definitely be getting the max from someone. Probably more than one team. Likely NOP.
I'm thinking out loud here but can't you make a case that it's better if the Pels don't trade Davis for another year? We can probably imagine the soonest we'd get him is after next season, presumably if the re-signed Cousins does not make an impact and they miss the playoffs.
Under those circumstances, the following would be true:
1) Al's 3rd year would be over and as an expiring, we would be 'free' to trade him if desired, which is big because we need a big salary to match Davis's.
2) We would know if Kyrie is re-signing. Kyrie and AD are close and if Kyrie re-signs, it could help.
3) Jaylen and Jayson should have even more trade value. Jaylen made a leap from the start of last season to the end, and then another leap this offseason, and Jayson is probably already better and borderline untradeable. After another offseason and full year of seasoning, Jaylen may improve to the point where Jaylen, Al and a pick gets it done, which it wouldn't now.
4) AD should be cheaper because he'd have 1 to 1.5 less years on his deal.
5) If we get the Lakers pick, they can't angle for that and we'd offer something else, and if we get the Kings pick we can offer that and even potentially know its spot in the draft order.
Aren't all but #2 and #5 pretty certain to be good things for the Celtics assuming AD isn't available this year but it becomes a possibility at the end of next season?