That's not confirmed yet but it's highly probably. Remember Nintendo hasn't officially said anything at all about the Revolution except that it is in development, will be at E3 2005, and will come out "around the same time as the competetors' systems."
Personally, I want them to delay Zelda and pimp it up for the Revolution's launch, complete with the best graphics, sound, and music imaginable and ready to take advantage of whatever features the Revolution may have.
BTW, it's not a big deal that this will come out simultaneously worldwide. OoT came out in the same week in all the regions, and I'm pretty sure MM came out on the same date in the US, Europe, and Japan.