As per Virgin policy when I booked my flights to NRT they allocated a J2000 layout to the plane. I picked seat 4K both ways. I have checked itn.net and its now apparently suite fitted. 4K looks liks a good seat on that aircraft too. It is apparently reserved on both my flights. Do you think that my J2000 booking will be changed to the same number seat on the suite aircraft?
I you check on 'manage you flights' on the VS website. You will be able to see which seat you are allocated.
I can't see why they wouldn't just transfer your seat reservations to the new a/c, assuming that both seats are in the same class and are pre-bookable.
Nick