DLC is an area that Nintendo have no experience of, and it's one that they're going to have to learn quickly as the announcement of Nintendo Network also confirmed the ability to enable DLC in games. So what can Nintendo offer on the downloadable content market? From a company that demands perfection at launch, DLC will only come in the form of optional content, and there are a variety of exciting options available to Nintendo for their big three franchises.
I have a feeling that DLC strait from Nintendo for in house games will be epic. I am sure they will add large upgrades and extensions to single player games. DLC from most other devs will likely be more of the same we have seen for the last 5 years.
It will look like free DLC :)
Nintendo did some DLC before, for Professor Layton and Picross 3D has downloadible puzzles
I see them doing it either really good or really bad. Like a new temple in LoZ for $5 or a Top Secret Area (infinite powerup room)in Mario for $5.
Long as its not price like and or look like Activision and Crapcom DLC, I don't care.
I would only care rof mariokart DLC classic and new tracks. and zelda expansion packs