Well, Zucharello went the other way, so possible.
Between money issues and being one of the oldest teams in the league, I believe the Stars will trend younger, specifically making moves to do so, and yes, including Cogs if there is any way to get an asset for him, Sekera, and Perry being gone as UFA, Polak retired, and probably Johns on LTIR or retired. Dowling probably is an AHL lifer.
The replacement players are there, the salary is cheaper, and you do need a certain amount of roster change over from year to year. Actually, if Johns really is done, which I believe, it might be more likely to bring in a UFA D than FW. Maybe they stick with Hanley and Harley as the third pair, but that is a little scary.