That may be, and is possible, that Nintendo wants to head in another direction. But if there is no Hyrule, then the other games won't exist, especially if WW comes before the other games.
And it wasn't a death wish, he didn't say "I don't want you to call the next land Hyrule", he just said that the next land won't be Hyrule, as in it just won't be the same. Very subjective, the king.
It may not even be Link and Tetra that makes the new Hyrule. They may find new land, but it may not be Hyrule. I personally think that WW left lots of openings for the sequels. First, Link and Tetra find a new Hyrule. The Great Deku Tree might bring the land together as one, like he said, making that the new Hyrule. Also, the water might get drained out somehow, revealing the ruins of the old hyrule, then they'll work on its restoration...ya never know...Nintendo/Shiggy will come up with something, no doubt