I am going for all Amiibo, and while I do not have Doubles of most, I have a huge chunk of sealed ones, and I want to at least have a few sealed Amiibo for every 'Amiibo series'. They just look very nice in the packaging, too. I am sure we'll get new Smash Amiibo with this game, but I am not sure if I think the'll make new ones out of EVERY character.
Then again, most are surely gonna get new art, right? For promotional purposes and with characters like Link surely having his BOTW outfit for his main art. I am excited to see the new art, they always look so nice.
Oh, how about this. We'll get a new Amiibo for EVERY Smash character. But! They are all the size of the Detective Pikachu Amiibo.