This is not confirmed, since you need a level 3 garrison and a boat yard to get to the new zone you can turn flying on and just not allow players to fly into *that* zone.
It is not confirmed until it is confirmed.
Besides, we all know that even if it is not allowed this expansion the pro-flying group will keep complaining about it in hopes that they can fly in the next expansion and the anti-flyers will keep trying to shout them down in fear that flying will be instituted. If you hate this thread so much you might as well walk away from it because so long as someone hates not flying or loves not flying there will be discussion to be had here and there is no way to 'win' it.
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I do hope they put a flight point near the new raid, I do hate wasting my time ignoring all the "savage" trash by pushing 'w' in a straight line on my ground mount. I need my facebook and netflix time after all.