If they were to do it right, I'd say they'd need to start the archival and transfer process of the original film footage ASAP.
It would take a while to simply assemble the footage, organize it, and index it. The next step of reproducing the TV edits from all the film would take a ton of time by itself.
I don't think that would be practical. Why transfer the tons of film that wasn't used to get the, presumably, much fewer shots that actually were used in the episodes? I would think they'd want to find the right shots first, then transfer them, then edit them.