Could be as simple/unsexy as a buyout.
Just to clarify: A buyout isn't really separate from waiving.
I.E. - waiving a guaranteed contract requires buying out the contract. The contract is guaranteed. You have to pay it off.
So technically, Danny's verbiage should be interpreted as saying that they have "things they could do before doing a buyout".
So it would seem he HAS opened the door that a trade of some sort is still an option. But in typical Ainge style, he ultimately hasn't said anything committal one way or another.
LOL - end result probably will be just an unsexy buyout of one of the three obvious candidates (Fav, Powell or Pressey).