Zelda U: What is in this Massive World?

[freebs2]

http://www.idigitaltimes.com/zelda-wii-u-release-date-new-open-world-zelda-will-have-multiplayer-confirms-aonuma-375758
Remember Anouma said something about multiplayer? Maybe in this vast world you'll encounter other players, maybe in some altereted forms, like ghosts in Dark Souls.