The name isn't confirmed, but I reckon we'll be hearing about an official name very soon. However, I think this is sort of a weird thing. Aonuma has been ridiculously secret about just the title of the game, saying that the title would be this major spoiler for what the game is about, and "Twilight Princess" (if indeed the literal translation comes to that) doesn't give us a lot that we'd expect not to know...
"There are some who call me... Link?"
"Carpe Gaium Domesticum!" (Seize the Cucco!)
Zelda: The Grand Adventures | Triforce MUCK ザ行方不明リンク
悪いユウモアの賢人