We’re mostly focusing on crossovers that would appeal to Japan first, because that seems to be Nintendo’s plan as well, but we wouldn’t put it past the company to make some Wii U and 3DS games with a western franchise as big as Lego. Nintendo is already publishing the Wii U exclusive Lego City Undercover, and that game has some sly references to classic Nintendo games. If the companies are already on friendly terms, why shouldn’t Nintendo follow Harry Potter, Marvel Comics, Lord of the Rings, Star Wars, and Batman into the profitable realm of Lego?
How would it play? Expect the gameplay to be the same open world, light action-platforming that most Lego games use so well. However, while that’s easy to pin down, the hardest part is deciding which Nintendo franchise to use. Nintendo could allow for a full Mario or Zelda adventure in block form, but it’s not Nintendo’s style to let someone make a title so close to the originals. Instead, the two parties could take the Nintendo Land approach and just Lego-ify 10 to 12 classic titles as cute, miniature versions of the originals. The experience might not be as deep, but this means those that wanted a Lego Kirby, Lego Pikmin, and a Lego Metroid will all get their wish.
Source:
http://www.gamesradar.com/10-nintendo-crossovers-need-happen/