The Medusa trailer below is one of the better videos Nintendo's released, with new bosses, weapons and wizards of various foods on display. At 4:38 it's got everything you could need to know ahead of the game's release in just two weeks.
In other news: water is wet
But of course
Islands in the Sun
It's a battle it can win
"NX will not be discussed or revealed in this broadcast", so there
Key early tips for this massive adventure
Talking 'bout our generation
Time to upgrade that SD card?
Night and Day, Beauty and Expansion