This franchise can't catch a break in recent years. Of course the Magic have turned their season around with their best player injured, Fournier having a career season and Fultz showing signs of life.
This lessens the likelihood of them having interest in DeRozan, since Fournier, as one of their 3 plus 3-point shooters (Ross, Augustin), is a better fit anyway and Fultz is showing that his development might be worth prioritizing, at least over a pseudo star like DeRozan (they can't really play together, so his role likely would have been minimized in such a trade).
If they're out, it's probably down to either the Pistons expiring's and lottery protected 1st or re-routing that to the Thunder and taking on Paul. I could be wrong, but I believe the Spurs' preference would be more so the latter kind of trade.