Wow you guys are quick ! Thanks so much for the responses so far. Looks like the chances are better for my return flight from Hong Kong. I will update you guys once I hear back from cathay.

I understand I cannot upgrade to J with an existing redeemption ticket via points or money. However, is there a chance they will give me a free upgrade if there's seats available before take off in business with a mpo gold ? I know it's a stretch....but thought it'd be worth a shot! Is this called an op up?