I don't think Markstrom will get 6 m x 6 yrs. I see Markstrom getting 5 M to 5.5 M for 3 to 4 years.
Honestly, looking at the market, I can see 2 or 3 teams who would legitimately come after Markstrom. I think teams like Calgary, Columbus, Chicago are going to roll with their guys in Rittich, Korpisalo, Lehner. Their numbers are not really far off from what Markstrom is doing.
I can see Buffalo, with Ullmark as a RFA (but numbers are not that much off from Markstrom) and 1 year left of Hutton who has a $2.8 cap hit, so a buyout should only cost them $1 million in dead cap. That's a legit option as they have cap space to make the move.
Detroit, they have cap space. Howard is UFA while Bernier has another year left. But, negative for them is that they seem like they will be a bottom feeder for another 2 years until a couple of top end talent emerges for them. Marky may not want to go through that again unless the term and money is too good to pass up.
Carolina, both of their goalies are signed for next season. But, they will cap space. So, if they need to eat a contract, they can. If they pay the SB to Reimer, then his $3.4 mill cap hit is just $850K in salary. Have the assets to attach a pick to move it out.
I would leave NJ out because Blackwood is a year younger than Demko and he's getting the bulk of the work for them. Numbers are ok given how bad NJ is this season. Term on Markstrom would be too long to hold onto Blackwood who is eligible for the ED.
Holtby will also hit the market. I think that would be Carolina's target as he has the playoff experience over Markstrom. Greiss is UFA, but like Lehner, question will be is he the product of the Trotz system or can he put up good numbers away from Trotz. Halak will be out there as well. Very good numbers in Boston, but again, he's more a 1b goalie.
Another team can come in and give him an offer. But, any team with a goalie under contract, it's extremely difficult to move them. SJ, Jones has too much term to dump.