Derozan is a tough one because he's a negative contract at this stage. He's making a ton of money but a team on which he is the best/highest paid player is one that has a pretty low ceiling.
He could definitely be the third option on a contender, but his money makes that difficult. I think he makes most sense on a team that is on the periphery of either making the playoffs, or taking the next step in the playoffs.
The Pistons make a lot of sense imo. Reggie Jackson and Tony Snell should work money wise, and a lottery protected first seems fair. Jackson is Expiring and Snells player option is less than half Derozans. Adding another bad deep shooter to that team isn't ideal though.
The Timberwolves would be an interesting option too. Derozan makes them more competitive this year, which they seem to be intent on, and it could be a way for them to offload Wiggins. Wiggins would surely be interesting in a Spurs system under Pop.
The Wizards could take Derozan back for Beal if the Spurs were willing to give up a young player or two and a first or two. Doesn't seem like something the Spurs would be overly interested in and there are probably more appealing packages from other teams that the Wizards would prefer.
The best option imo though would be the Trailblazers. As I mentioned, Derozan best role now is probably the third option on a contender and he'd be exactly that on Portland. He could also run the second unit when Lillard is on the bench like Turner has done for them in the past. He fits nicely alongside Lillard and McCollum too as a dangerous ball handler who those guys could play off. Bazemore is making 20ish this season so one more contract should make it work. Whiteside makes roughly the same as Derozan so that could also work, though Nurkic is obviously coming back from an injury and Portland are deeper on the wing than they are at center.