Despite its focus on the 3DS, Nintendo opened its pre-TGS press conference with plenty of talk about the Wii game The Legend of Zelda: Skyward Sword. Though the Japanese presentation wasn't translated at the time, details are starting to come out about the new revelations.

A series of tweets from Nintendo of America, and a new video detailing item upgrades, give a better idea of what to expect from this expansive Zelda sequel.

For one, Skyward Sword promises to be the longest Zelda game, as Shigeru Miyamoto mentioned it could take users 50-100 hours. That's a pretty wide gap, but even 50 hours is tens of hours longer than previous Zelda titles. The game will also sport hint movies akin to Ocarina of Time 3D, and second play-through (presumably a Master Quest) and boss rush mode.

This Zelda title will also sport item upgrades, as detailed by a new gameplay video. In it, we see Link collect a few items like amber and a skull, and then head to a sky blacksmith to make his shield stronger. Nintendo has dabbled in Zelda item upgrades before, mostly from tossing things into ponds and getting better versions from a fairy, but this system looks much more robust.

Skyward Sword is due November 20. Check out the shield upgrade video below: