"how can we get all exited we dont even know the story line yet"
What do we need the storyline for? The storyline is always my last concern regarding a Zelda title (as it is with the game designers). I want to know what the gameplay is like. Every Zelda game has some main gameplay idea that it focuses on (wind, parallel worlds, time travel, masks, etc) and I want to know what it is for this new title. As long as the storyline isn't incredibly dumb I don't care about it.
As for getting excited already well Zelda has a pretty much flawless record so far. When the closest thing to a bad game is one "different but not necessarily bad" game released 16 years ago people are going to get excited about any new entries.