Honestly, if Ainge won't give up the 2017 Nets Pick now, and say it lands #1 or #2, I fail to see Ainge giving that up at all in the summer unless the other team agreed to only take the 2017 Nets Pick + Just Bradley and some low salary filler/low assets.
If the price is that right now, Ainge should be making the trade. But it's obviously not.
But in the summer it gets interesting because then PG13 is an expiring. Butler down to 2 years left.