Denver would have to get some better talent back then just Deng and CHI's B grade prospects. Otherwise you don't give up a superstar. Maybe if CHI sent to first rounders with Deng, DEN thinks about it.
I do think Melo's bad boy rep is overstated, but they just signed Korver in CHI, so I think they are OK if Deng can embrace lock down defender mentality. Thibs could bring that out. Don't know his offensive game to say if he'll be a good 4th option.