Absolute bollox, they haven't decided anything that far ahead on any route yet. You've either made that up yourself, or whoever 'told' you did. I'll go with the former myself.
Are you sure you didn't see an email about a possible diversion again ?.
That came from someone who has no reason for lying, and in regards to the "diversion", yes JAL did sign a diversion contact, FACT. please dont make childish comments!!