Why on earth would we want Bargnani, unless the goal is to tank for a lottery pick?
Bargnani is one of the worst players in the league. He's a terrible shooter, terrible defender, terrible ball handler, and terrible rebounder. The only thing he does moderately well is shoot 3-pointers (but even then, his percentage is only average) and free throws (but he never gets to the line because he doesn't bang around inside). A big man has no right shooting less than 40% from the field.
Have people seriously not noticed that for 7 consecutive seasons that Raptors have been significantly worse both offensively and defensively when he is on the court?