Then the previous sets with older art can become collecter's edition sets! Or something.
Horrible idea is horrible (in that many people haven't been drawn yet, and it'd be unfair for them)
Well the Idea is sorta interesting in the fact that.. (from a purely egocentric/capitalist point of view) those who weren't drawn
may be less likely to decide to purchase a deck, since they weren't featured in it.
If Virmir were to change the Diamonds and Hearts suites with different characters around for the new decks, keeping the virmir/Cf decks the same, he could theoretically sell more!
Anyway as far as I know thats highly unlikely to happen anyway, since by now Vir's throughly sick of making the cards.