Thing is... Daisy was only brought back from Super Mario Land for spinoffs, so if she does appear in a main game, it's only a hidden cameo or reference. Wario appeared as a character there only because he has his own series and a bigger impact than Daisy did. I'm not hating on her, it's just that I don't think Daisy is a character that has the potential of being a playable character in a platformer. Maybe some day when she gets more recognition, but for now, I don't think so.