I do want to point out that its really hard to dictate popularity nowadays solely on game sales for a system....and it totally is lacking in demographic information.
Fire Emblem flops on Nintendo Systems yet for phone apps, its Nintendo's number 1 App game making them over 20 million every month (Variety) and Animal Crossing: Pocket Camp is extremely popular with adult women whereas the other Nintendo apps are not (Nintendo Earnings Report).
Nintendo went into this deal to
INCREASE the scope, visibility, and opportunities for their company. Why do you think the initial concept and pitch had so many different IPs represented on there? I'm not saying everything should get a huge E-ticket but you kinda don't help your flop IPs by not having them present in a way that has the potential to boost revenue. People are already buying Mario, Zelda, and Pokémon. Use those are big attractions to get them in the park and use the other IPs as smaller attractions/cafes so they at least get people awareness there. They aren't buying your other stuff which is why it should have some form of a really good attraction in the park so its on the forefront of people's minds later on.
Just for giggles....Nintendo has an issue with games across all systems. Simply look at the top titles across the board for all the systems. Its mostly just Mario that can sell a system with Pokémon and Animal Crossing being the only two consistent non Mario based IPs to move handheld systems and Splatoon and Zelda being the only ones that managed to break onto the scene for the docked systems.
IR Information : Financial Data - Top Selling Title Sales Units - Wii U Software