Coming from an interview with Nintendo Life...

We're certainly looking at different ways to add on content that would enhance the experience for the user - maybe more places to explore or just to enrich the experience beyond what is on the disc. But we also have to take into consideration that if we charge for this content then it needs to be worth it for the user. So it's certainly a balancing an act, but I can't say that it is something we're not considering.

Not sure how I feel about it, but I wouldn't say that it's a bad thing. I'm sure Nintendo will use it in a rather interesting way.

Link, Link