Yes, we probably will get a Sora amiibo. But at the time of writing, we're in a somewhat strange situation. In October 2021, the final fighter Sora was added to the game.

Will there be an amiibo for Sora?

It has been confirmed the that first four will be getting amiibo, but no official word as been given about Sora. Speaking of Sora, the Kingdom Hearts hero was the final DLC character released for Super Smash Bros. Ultimate. So, assuming Sora does get an amiibo, he will also be the last in game's series of figures.

What is the rarest amiibo ever?

Golden boy Gold Mega Man

This has become one of the rarest amiibo on the market because it can only be purchased in a special bundle for the Mega Man Legacy Collection game on 3DS.