If the Sharks bought out Martin, and Thornton gave them a sweetheart hometown deal, they could conceivably have
Kovi - Couture - Hertl
Kane - Pavelski - Donskoi
Labanc - Thornton - Meier
Boedker - Tierney - Sorensen
Ryan - Burns
Vlasic - Braun
Dillon - Demelo
It'll likely never happen, but if you're the Sharks with a smaller window with some of the vets like Pavelski, Thornton, Burns, Vlasic -- heck even Couture is 29, why wouldn't you roll the dice on a short term deal with Kovalchuk. That would give them top 3-5 offensive depth (Thornton as a 3C, Boedker in the bottom6 with some of the young kids like Meier), a really potent powerplay, and a pretty solid top 6 forward core. Heck their top4 on defense isn't even that bad, all will depend on Ryan's growth.
I actually think Kovi signing with the team is a huge possibility because of the Pete DeBoer. Kovi was a beast under DeBoer, and they had that huge run together.