Sharks would be scumbags to aid in this by agreeing to terminate then re-sign. Ideal situation is he terminates then no one in the league will even consider signing him.
I have trouble seeing him be able to terminate his contract to get out from under this unless his plan is retirement and never being an NHL hockey player again, depends how the collateral is worded in his contract, but banks aren't stupid, that's a huge and obvious loophole - the collateral is likely worded in such a way and that would use a "contract while employed as a player in the NHL" - rather than this one contract paid by the sharks. So what if he got traded and the contract is no longer between him and the Sharks? The bank just loses collateral? No way.
There's no way he gets to walk away for a year, then come back with a new $30 million contract and not have his wages garnished. Jack Johnson got blown up over things he didn't even sign to lenders charging crazy rates (basically sharked), and still had a huge settlement. Kane is rightfully f***** here, these threats seem pretty empty.
Get them down to 50-65 cents on the dollar, give up your three houses. Pay them 10 mil over the next three years, and still keep millions.