I'm booked on a business class points award on an international flight from YYZ to NRT, and unfortunately, for the outgoing portion, there are no business class points seats left, althought there are several revenue J seats available.

My question is, I've booked that portion on economy, but will get upgraded if there are seats available. Does this points ticket (that was redeemed on a business class award) get priority for the business class seats, or will SE/E stickers get the priority? Thanks.