The chief pilot was asked this in a webinar the other day. His exact words were "at an appropriate time we will follow the RIN process". Make of that what you will.
My personal opinion is that the retirements and remaining 747 pilots would have already been accounted for with the next 3 787's.
With the head of training saying all courses have been deferred, I suspect those waiting for a RIN off the 747 will just stay stood down.
How they get all the wheels turning again is going to be a big task.