Since when does cdp give away their newest game?Cd Projekt Red with The Witcher series disagrees with you and has had great success doing so (along with providing DRM free games).
I don't mind if you think the same way.You may not think that but not everyone thinks the same way. My point was if they were to give it away for free not only would it help the sales of the NSMB U game but it would also help towards incentivising the purchase of the Wii U. In other words it make Nintendo look a lot better in the eyes of gamers yet to invest in the system. It would also go some way to appease those who already own the system and game.
Your opinion isn't my opinion.
I dunno if it'd get people to buy nsmbu.
I think the people who would buy nsmbu for this dlc are either luigi fans or already own the game and have completed it.
It is an "evergreen" though, maybe you're right.