Baba, Inoki, Mask, Mascaras were never actually signed. Piper didn't sign but gave Tom a verbal okay (which was why he was a givewaway instead of sold as part of a set). Andre was signed for the B and W card and Tom wasn't sure if that would carry to a color card (from my understanding at G-Con)
Well other wrestlers gave a verbal yes and never signed and they didn't get a card.
Piper was a little more strident in wanting a card, the way Tom told the story, he just told Tom that "you know I can't actually sign," presumably due to contracts with WWE or possibly even movie studios precluding him from just handing over his likeness on paper. It sounded a little different from, "Yeah, I'll sign, just send me the paperwork" and never getting back to us.