I can see a pretty good chance that AD get's a buy out this season and then would be available for the min. he didn't play much last season and now that the Hornets added Collison and Thornton this won't change.
if he agrees to a buy out, that is his contract minus the vet. minimum, the Hornets will save twice the money (even more if this move get's them under the threshold), meanwhile AD wouldn't lose money (I assume he will get a vet. min. contract), plus he can chose the new team, plus he can chose a situation where he get's more minutes.
however, this team likely won't be the Spurs, I can't remember that there was much love left when he left.
this aside, IF he would sign for the vet. min, I'm all for it. AD still can't shoot, but he's a capable playmaker, rarely turns it over and is still a decent defender. would be a huge upgrade over JV from last season.