Quoted from Jediturtle:It is Stern's name for when they bring a pin back that has been out of production for awhile. Sometimes that means it will be in exactly the same form (Star Trek), sometimes minor tweaks (Iron Man), sometimes it's a completely new art and A/V package (Spider-Man). There was rumor that Transformers would be getting a similar treatment to what was done for Spider-Man's vault. Kind of a shame to hear it might not happen now. Underrated game that could be great with a few tweaks.
Transformers, vaulted today, wouldn't make financial sense to me. It would obviously be priced at today's MSRP and that would put a Pro more expensive than you can pick up the LE for, today. Maybe the retro 84 gen 1 package could make up for that. They'd have to hire Peter Cullen and Frank Welker to pull it off and get people to pay today's prices. Just my thoughts.