I think the cutscene time, which has been confirmed to be over 100 minutes is worth mentioning here. If you compare both it actually makes it sound even better, because Twilight Princess had around 90 minutes of cutscenes (not much of a difference) and was supposed to last 60 hours or so...
I think that could either mean:
a. A harder version of the game (think of an included Master Quest).
b. Maybe like Wind Waker where you can do the game again but with the same clothes you start with.
Or you could go with...
c. Anything else that I didn't mention it the other 2...