StreetsAhead
Member
Here's a crash course on Nintendo game unveils:
They hit you with the bare minimum at first, enough to whet your appetite, and show you how the game plays on a basic level, without revealing any of the juicy goodness hidden beneath. Remember how the second half of 3D Land was embargoed even from mentioning in reviews? Most people consider that the best part of the game by far, and we didn't even know about it till we played the game ourselves. That's Nintendo. Slow hype buildup to a fever pitch near release date (ideally). It's working with 3D World, although they almost certainly regret leaving a bad impression at first. They should have shown just a bit more.
This is what gives me hope for Yoshi's New Island and Kirby Triple Deluxe.
Although, I would say your point does not apply to their sports games like Mario Kart, Golf, Party, Tenis, etc. Or, at least, not as much.