Since the amiibo figures use NFC, how plausible would it be to use a phone to read the NFC tag and then rewrite it to a plain NFC tag? I don't know too much about nfc but the Wii u uses a broadcomm chip of some sort. I guess it may even be possible to use HCE on an android device to use your phone directly without programming a tag. I guess nobody knows for sure at the moment but I find it interesting to think about.