Ocarina of Time could have come before OR after The Wind Waker. Correct me if I am wrong, but the very first Zelda game was in Hyrule, and it had Ganondorf has the evil man you were supposed to confront ... right? And you cast him down, right? So what if Ocarina of Time took place in the "new" Hyrule that they found when they set sail from Outset Island at the end of The Wind Waker? It is a distinct possibility.

So Forsaken Fortress could be something from the first Zelda game.