don't see why they'd go for any of that
The reason why I'm predicting that it could be those three is because:
They might announce Raboot on Pokemon Day because Nintendo probably wants Sakurai to add him to Smash, so they have a Gen 8 rep. in that game and also shock the Pokemon fans on that day as well.
They might announce Raymond in late March, because the 20th will be the one year anniversary of New Horizons, including it was their best selling game last year. So they probably want him to add him to Smash, not only to have a rep. from that game, but also he’s the most popular villager from it as well.
They might announce Tyson during the summer, he’s probably going to add him to Smash to not only shock the world, but also give Little Mac his arch rival as well.