The Stanley Cup champion Vegas Golden Knights knew this current roster couldn't come back fully intact. With the recent news that the salary cap is only increasing one million dollars bringing next seasons' cap at $83.5 million, the task is officially impossible.
Vegas only has $3,462,516 in cap space for next season. Pending the status of enigmatic goalie Robin Lehner they might be able to clear some more cap space,
I predict something like the one fellow countryman Valeri Nichushkin signed after winning the cup for the Colorado Avalanche last year, 8 years worth $49,000,000.