So I´m trying to find clues here.
Wave 1:
Mario, Peach, Yoshi, DK, Link, Pikachu, Kirby, Samus, Fox, Villager, Wii Fit Trainer, Marth.
12 figures.
7 Common.
2 Uncommons. (Samus, Fox, even if he is rare now)
3 Rares.
Of this, 11 characters, all except Peach, are Main Characters or mascots of their respective series.
2 are nameless characters and they are also the only representation in smash of their series for amiibo (Villager, Wii Fit Trainer)
Wave 2:
Luigi, Zelda, Diddy Kong, Captain Falcon, Pit, Little Mac.
6 figures.
2 Common.
1 Uncommon. (Diddy, common now)
3 Rares.
3 are the second most important character of its series (Zelda, Diddy, Luigi)
3 are main characters of their series (Captain Falcon, Pit, Little Mac)
Wave 3:
Bowser, Rosalina, Toon Link, Sheik, Lucario, Sonic, Megaman, King Dedede, Meta Knight, Ike.
We still don´t know for sure, but so far it seems Bowser is the only common from this batch.
In this wave we have:
2 Villains (Bowser, King Dedede), 3 if you count Meta Knight.
2 Third party characters.
2 Main characters from a later entry of their series (Toon Link, Ike)