So we're all about blaming Nintendo for a Konami game that might turn out to be really great just because it features Mario? Wow, get those pens out, cause you guys have a lot of back logged feedback that needs to get over to Disney about their shitty DDR games.
I'm sure Nintendo is funding the game to an extent, or even simply allowing the use of their royalties free of charge, but in the end, it's Konami that makes the title, Konami that adds what they want, and Konami that has the final say. Nintendo might approach developers with deals providing usage of their properties, they might approach developers with money, but in the end, it's the developers choice on what they want to make, how they want to make it, and so forth.