im with you guys, i just want it to be a Good enough game to give me a reason to get the Wii U, i buy nintendo systems for Zelda games, all the other (In my opinion) mediocre titles are just an added bonus!
as far as game length goes, i feel SS and TP were just right, 50-80 hours of gameplay is fun, 100...,.i feel would be tiring! but that comment comes with a catch. 100 hours of main story line missions, may be a lil long, so i say 50 to 60 hours if only focusing on the Main Quest! We have yet to see a zelda game that gives us the best of both in terms of main quest vs side quest.
MM had a VERY short main quest, but actually completing the game in full with all the side quest, that made for a really long game. So i feel the Length of the Main Quest in SS is perfect, but and additional 30 hours of side quests would not be complained about by me, and i doubt others would complain about additional content you dont HAVE to do, unless someone just cant play a game without 100% Completion like i used too be, i could see it being annoying.
But with all that extra content, and without the NEED to complete everything every time you play the game, there is a chance for a very high replay value, which zelda somewhat lacks....kinda. dont take that comment too serious or to heart.