Deus, normally you and several of the other posters on this thread read the NBA and Celtic tea leaves pretty well, so I'm surprised that so many of you have missed the obvious for the Celtics and 76ers. Looking between the lines, it is obvious.
Boston has a pile of talented guards and swing men. We are stacked at there 1, 2, and 3. We will probably play one of those swing men (like Tatem) at the 4, and at the 5 it is clearly a work in progress.
Exaggerating a bit, Philly is trying to field a team consisting of two fives (Embiid and Horford) two players that are tall enough to play the 4 (Simmons at 6'10", Harris at 6'9") and a 6'6" swingman who could easily play the 3 (Richardson).
The solution is obvious. Merge the two teams, to form the Boston/Philadelphia SEVENTYCELTICS! In the back court, Kemba Walker, Smart, Brown, Haywood, and Richardson. In the Front Court, Simmons, Harris, Horford, and Embiid.
Remember, you heard it here first! I expect Wojnarowski to be stealing my scoop presently.