Not sure if anyone has brought it up here yet, but I think it's worth mentioning that every first/second party newcomer thus far has either come to or risen in prominence during the Wii/DS/Wii U/3DS era. Villager, while introduced with Animal Forest and Animal Crossing, certainly only rose in popularity with Wild World; City Folk; and New Leaf. Wii Fit Trainer I don't need to say anything on. Rosalina is of course representing Super Mario Galaxy, one of the most successful duologies of games in Nintendo's history, and seems to be rising in significance if 3D World is any indication. Little Mac received a popular revival just one year after Brawl's release. Greninja's the final evolved form of Gen VI's most popular starter line. Miis, well, see Wii Fit Trainer. Palutena's received a surge in popularity thanks to Kid Icarus Uprising. Robin and Lucina are two members of the trio of protagonists of the most popular Fire Emblem title to date. I think this trend speaks very well for Shulk's chances thus far.