I recently found some new info regarding TP hope you guys enjoy it :n_n
1)Eiji Aonuma confirms that we can indeed expect around 100 hours of gameplay in Twilight Princess.
2)He is most pleased with how the puzzles in Twilight Princess have turned out, though that is not to say the game in whole is not a gem.
3)We can expect more dungeons then in any previous Zelda game.
4)Among the many different characters, we will see the return of old characters and races, as well as new ones.
5)They have planned extra's and unlockables, most likely to be put on an extra bonus disc, as we've seen with The Wind Waker.
Enjoy :happy Ps: t=This is valid info i got from an interview from E3. More info coming soon hopefully. :happy