Next year he goes to arbitration. With his "lights out" season this year, he's in position to demand the moon. Arte already gave the moon to Trout and won't pony up another huge contract.
Shohei is smart enough to see the writing on the wall and knows the Angels aren't in his future if he wants to win.
Be ruthless with the trade negotiations and get the absolute most for him. But you never know what that first-time GM will do.