The new Super Mario 3D Land for the 3DS celebrates the 25th anniversary of The Legend of Zelda with a tribute level.
The Nintendo creators working on the game showed a glimpse of the level in June. We just played it today. Take a look. It's world 5-2, and while this may spoil it a little for you, we didn't find all the hidden stuff. So you're not seeing the whole tribute.
Now where's that Metroid 25th anniversary tribute level? (My guess: it probably doesn't exist.)