Could be Jeff Halpern.
I doubt Philippe Boucher would give up the Quebec Remparts GM/HC job to be the HC of an AHL club in Tucson, but if DT hints that Playfair is on thin ice or that he himself might step up to the front-office in the next few years and Philippe Boucher would then have a clear path to the HC AZ job, he might pay his dues in Tucson.
Mark Lamb played for DT in Houston and then retired. DT brought him in as an AC in Dallas his first year as HC there. Lamb remained an HC during DT's entire tenure in Dallas. When DT came to AZ, Lamb went back to the WHL (he's yet another Sasky boy) to coach the Swift Current Broncos where he has served as HC/GM for the last seven years. The team has not once made it out of the 1st round in that time, and it might be time for him to get out of town before he gets canned. DT (caring more about relationships than results) might be inclined to throw his old pal a life-line in Tucson. PS - they were also briefly teammates in Philly for the Flyers.
So I'm going to say it will definitely be Mark Lamb. And Les Jackson will be the AGM who manages the Tucson team. The band will be fully back together with DT, Lamb, and Les Jackson.