No surprise that 538 currently has a very positive view of the Celtics.
RAPTOR player ratings for the Celtics:
Highest projected record - 57-25
Highest Chance of making Finals - 35%
Highest Chance of winning Finals - 23%
Elo forecast for the Celtics:
Highest projected record - 57-25
Highest Chance of making Finals - 33%
Highest Chance of winning Finals - 20%
Both projections have the Grizzlies 3rd, Nuggets 5th, and the 76ers 6th. Celtics wins against those three helps the Cs ratings.
I know it's early and many on this forum discount 538. I don't care, the Cs are playing great ball and I am thinking #18 looks very possible this year.