The code for the Amiibo is in the game. And the game is updated before the new figures are out obviously, so you always will have unreleased Amiibos (and Skylanders/Disney infinity) available to skilled devs before they are released to the public. So you can expect Amiiqo to give its users unreleased new figures on a regular basis.
you just put the image supplied in one of the 200 slots, and voila, you have a character no one has.
Does that mean we'll be able to get Vol. 2/3/4 Happy Home Designer Amiibo Cards before they come out?