The reason we're not seeing a 2016 release for those remaining 2016 Smash Amiibo is they are being held for Smash port release.
Switch getting Smash Bros port. Not launch day. Not confirming other Wii U ports. Bayonetta / Cloud Amiibo held for 2017 Switch port launch.
Smash Port is NOT launch day. Targetting first six months. Amiibo launching same day.