As a Celtics fan, this is not ideal. This is the trade I think they make:
Raptors trade: Patterson, Ross, and Cabloco
Suns trade: Markieff and Tucker
This gives the Suns a stretch four to replace 75% of good Markieff Morris. It also gives them two interesting prospects to build around with Len, Tucker, Booker, Bledsoe, and Knight.
The Raptors finally get a scoring stretch 4. They also double down on Lowry's strength and toughness on defense by adding Tucker on the Wing.
Valancunas-Markieff-Carroll-DeRozan-Lowry, with Tucker, Joseph, Scola, Biyombo, Nogueira, and Wright off the bench.
That is a tough matchup. That is a team with the versatility to play anyone. Honestly, if that team could gel well, they could beat the Cavs in a seven game series because of their matchup ability and versatility.
And it would improve an Eastern Conference rival, which is bad for the Celtics.
Edit: Source of rumor is ESPN
http://espn.go.com/blog/nba/rumors/post/_/id/36855/nba-rumor-roundup-205