One thing I like about Nintendo vs. most major publishers is that they're regularly able to occupy a middle-ground between AAA and Indie games in terms of scope and production values. With most of their games, you can tell they're given a larger budget than a typical Indie game, but most also don't rival the sheer costs of conventional AAA games. Over the years, Nintendo has worked regularly with mid-sized independent studios in both Japan and the West, such as Good Feel, Platinum Games, ARIKA, and Next Level Games.
However, it's getting a bit harder to find developers in this field, as Sony and Microsoft are buying up more studios to prepare for next generation. I feel like Nintendo could be a viable "AA" publisher in addition to their main AAA franchises, in a similar vein to THQ Nordic or Take-Two's Private Division. I think Nintendo should try and get more developers like From and DOTNOD to make original "AA" exclusive titles for them, in addition to their regular partners.