I'm not necessarily a proponent of the deal, but if Treliving wants to build from the back-end out, he'll probably want to target a goaltender or a defenseman in a Marner trade. There's an opportunity, this off-season, to pick up a quality defenseman in free agency, possibly two if they can maneuver the salary cap.
You'd also have to think, if Marner waives, he'd be interested in a team that's going to be competitive. And for the team acquiring a player like Marner, they have to be able to feel like they can insulate him with a team flush on role players. Better again if they have a scoring forward that could use a deft playmaker.
That screams Nashville and Juuse Saros, to me. It seems to be a somewhat attractive market, has former teammates in Luke Schenn and Ryan O'Reilly, and a great goal scorer Mitch can feed in Forsberg. Not saying it's an ideal trade, as I don't really like gambling big on goalies, but in terms of fit, it seems to make sense? Both guys on expiring deals, both could use a change of scenery.
I'm not the first one to point it out (more like #19,435). I'm just struggling to find another fit on the market. I like the proposals discussed around Seattle, but they missed the postseason last year and I'm not really sure they're going to be as aggressive on the trade market as fellow expansion rival Vegas.