Okay guys, enlighten me.
For those who don't want this to happen, or are upset about Rosalina being in a lot of Mario games in general, what do you dislike about Rosalina?
Please answer specifically and not just "They're shoving her down our throats!!!" because you also get characters like Mario and Luigi and Peach in like every Mario game.
Not upset about her being in Smash and MK8. Nintendo is running out of recognizable characters to put in those so it's natural she'd get a chance.
But for her to get her own game seems rather unnecessary. If Nintendo has a gameplay concept that only works with Rosalina as MC, that's fine, but I can't imagine what such a concept would be seeing that she's just another Mario princess.