Wow. I like how people are claiming that the possible new comer list has no fan favorites when what they really mean is that it doesn't have Ridley and K. Rool and that they don't like a combination of Pacman, Mii, and the Chorus men.
Megaman, Little Mac, Palutena, Shulk, Villager, Rosaline and Chrom all had a lot of support (some more then others.) They're not Ridley or K. Rool though, so apparently they don't count. The thing is, and I say this with Ridley being my second most wanted character, both of those characters had things working against them. Supporters could plug there ears and not listen, but Sakurai clearly knows Ridley is important (he always includes him in the game) and has had multiple chances to put him in the game. If he doesn't make it this time, it is likely because Sakurai doesn't think being a playable character is a good way to represent Ridley. K. Rool still has a decent chance to be in, but if he isn't let's please remember that Donkey Kong Country is a living and popular franchise, and that he has not been an important part of it for fourteen years.
TLDR: The Sal Leak + Rosalina DID include a lot of requested characters, and some other fan favorites like K. Rool and Ridley may not be in the game for legitimate (at least to Sakurai reasons) and NOT because Miis might be playable.