I don't think $6M x 6 years is even an unrealistic ask from Markstrom. That's where the market has kinda gone, for a goaltender performing as he has lately. It's just a real concern when it comes to term for this team, and Markstrom at his age. You don't want to sign a goaltender to a big money deal that takes them more than halfway through their 30s. It's just asking for a disaster.
The other problem is obviously the expansion draft. If you sign Markstrom to a deal like that, it's almost certainly coming with some sort of NMC protection that would leave Demko exposed, which isn't great. So you have to figure out how you're going to handle that situation, if you're even going to talk about a big extension for Markstrom. Who is going to be your guy...not just right now, but for the next half dozen years or so?
It'd be a huge blow to lose Markstrom like that, but i think you almost have to play hardball and try to call his bluff. There are only so many landing spots, and i think most of them are also going to have similar concerns when it comes to term and expansion protection. Carolina is the team that really worries me as a prospective suitor for someone like Markstrom, who would be able to accommodate his asking price. Outside of that though, how many teams would really be willing to lock themselves in to that $6M x 6 with a NMC type deal structure?