It has to be great. It's literally Wind Waker 2, and it's been so long since Nintendo has made a direct sequal to a Zelda game (Majora's Mask doesn't count... It was more of a sidequest of the same Link from OoT).
But PH picks up right where TWW leaves off, on the port of outset heading out to sea with Daphnes (he's still a boat, but I thought he... spoiler of TWW... oops... not telling

), and the pirate ship with Tetra.
I just remembered something. GDT (Great Deku Tree), a Zelda site that's been long gone (or was the list time I looked) had a section on their site called the "Tetra Trackers" about a future Zelda game that was a direct sequal to TWW while Link had to look for Tetra.
Well, I wonder if Nintendo was influenced by this? This site was up before the DS was even concieved. And what gets me, is that the part of the story Nintendo has released about PH...
Apparently Link and Tetra are exploring when they stumble upon a ghost ship... Tetra goes aboard, and Link get worried and tries to come after her. He falls through the ship and into the ocean, and the ship disappears through a fog. Link goes in after it looking for Tetra, and comes out in some other world (or part of the ocean... remember they go exploring together, hence they wouldn't be exploring the islands Link has already explored)
"I am the woman of Photoshop... I play with the tools till I get what I want." XD