I'm hopeful, but i also don't know why dallas would do this unless we gave them something they wanted, i.e. bradley, JJJ, a good pick (first or good second like charlottes). As others have pointed out, even if we pay Dallas, anything they take in return will count againsth the cap, and they've really been working their capspace; not sure if they want Dooling for 3 million blocking potential amnesty bids, etc, just for a 2nd rounder or something.
Also, they would NOT get a trade exception; trade exceptions are given to teams over the cap when they deal a player into existing capspace on a team UNDER the cap. So not this scenario.