1. Well first, there really aren't that many offshoot Zelda games that are still easily available, now that is clear, to enjoy the new Zelda U, there really isn't a game you need to play, since even if the Zelda games are connected by a timeline, all of them have their own story, with no important connections to the other games, even direct sequels. Though to get setteld in with the mechanics of the series, I suggest you try A Link To The Past(Wii U VC) or if you have a 3DS, Link's Awakening DX, both great games, though ALttP is tougher.
2. The majority are available via Wii U thanks to the backward compability with the Wii. In the Wii U, you can play:
- The Legend of Zelda
- Adventure of Link
- A Link to the Past
- Ocarina of Time (via Wii VC)
- Majora's Mask (via Wii VC)
- The Wind Waker (Remade for Wii U)
- Twilight Princess ( via backwards compability)
- Skyward Sword ( via backwards compability)
Half of the series is currently available on the Wii U, the only that are not available are the handheld ones that may change when the DS virtual console hits the Wii U, and the possiblity of Phantom Hourglass and Spirit Tracks appearing there.
3. We don't know, but the most possible is that we will be able to use the Wii U Pro controller, since the only function the Gamepad seems to be use for is the map, so I doubt they will not let you change the controller option. The Wii U Pro Controller can also be used in all Zelda games available in the Wii U VC, for the Wii ones you will have to use the Wiimote and Nunchuck, or that other Wii controller, I think it was called the classic controller or something.
4. It all really depends on how you explore, if you are going for a 100% it may take even up to 50 hours, but if not, you could beat the game, in under the 20 hours, like I finished Skyward Swords in 19 hours. But it really depends on how you much you take exploring and in the dungeons, but do not expect for a Zelda game to be less than 10 hours.
COMG guide to points: 1 point = Raging. 2 points = Beasting. 3 points = Tearing it up. 4 points = Berzerk. 7 points = Rampage. 12 points = Burst. 15 points = god mode. 20+ points = DIVIDING BY ZERO!!! 40+ points = Youkai (originally Pokemon).
-1 = Negabeasting. -5= NegaRampage. -10 = NegaBurst







