Not sure if this is considered a spoiler anymore, but I'll just throw it up just in case the over zealous decide to hijack the thread's topic and make it about use of "spoiler" in the title, lol.
I remember watching Legion Beta videos of order hall campaigns and in the beginning of the shaman's campaign (when you summon Neptulon to speak with) first Ozumat appears and it looks like you may have to fight it but then Neptulon appears behind it, subdues it, implying he has tamed the beast.
However I just started my shaman's order hall campaign and when doing that part only Neptulon appears.
So was the Ozumat encounter taken out, or was it maybe moved?
I can only assume - if so - Blizzard is trying to save for the eventual Queen Azshara/N'Zoth content headed our way.