Oh right, now that you mention it they broke it off awkwardly with Neptulon being kidnapped and in the Shaman campaign he is all good... So that's a no.
I actually was hoping to see him corrupted in a _.2 patch in a raid style Throne of Thunder as an end boss and overall the raid to be some cavern
with awesome naga/weird sea bosses (Ozumat as well).
Also imagined it having a legendary style the one in Firelands, some trident/polearm that can fit druids/hunters perhaps some shifting one that can turn
into a staff for casters as well.
Anyways now we need a whole other plot to have a reason to go there, out of ideas atm