Okay... info... info... some of this is old news, some you may not kno yet. It's just a summary of what we (I) already know.
Link turns into a wolf
Zelda's in it
Ganon's in it
Skull Kid's in it
Some weirdo called Midna is in it
One of Tingle's freakish clones is in it
Ganon's not doing his usual job (which I assume to be uber-villain)
Midna is NOT the Master Sword!
Midna is NOT Zelda!
Link's the only one who turns into an animal
You can name the horse
You get a pet hawk
Forest Temple
Fire Temple
Water Temple
Ghosts
Horseback sword-fighting
Fishing
70 hours (or thereabouts)
Gorons
Monkeys
Best-Looking Water In A Game Ever (tm)