My optimistic take on "more villagers" theories is "adding all the amiibo villagers"
The hello kitty reprints feel obvious but let's not forget we're getting Mario items in March too, and while it is not by any means a guarantee, it would make sense to add the other nintendo items and if they do that then they may as well bring back the remaining Nintendo amiibo villagers: Medli, Epona, W. Link, Ganon, Inkwell, Cece & Viche. Maybe Feyline & the monster hunter set? The zelda villagers in particular would be fitting for the anniversary this year too.
Little weird they didn't add any mario-themed villagers, in retrospect. Like sure there's Louie but....more overt. If you can make squirrels based on inkling sisters I'm sure you can make some goofy mustachioed villagers or even a frog villager based on toad or whatever.