Deron says he's 90% certain he'll re-up with the Nets so that would appear to be a long shot. He also mentioned specifically that Chandler would need to be on the Mavs for him to be interested, I think.
Plus, if Howard goes to the Nets, Deron is staying surely. All in all, I expect all three of those guys to be off the board by next summer (D-Will, Howard, Paul). Although the kicker is that they can and likely will all opt out to take advantage of more beneficial terms offered by the new CBA, giving a crack of daylight for the Mavs and other suitors. But the incumbent teams really should have them locked up by then.