With an unfinished plot developed early on in Cataclysm, we managed to fight our way into the Throne of the Tides only to be dissapointed to find out that our Neptulon was in another castle! Captured by Squidward and sent off to the unknown depths of the plane of water. With the expansion rearing to an end in the not so distant future, I find it quite odd that blizzard did not capitalize on this opportunity to what I think would have been a stellar and exciting raid in the plane of water, namely, the Abyssal Maw.
I do hope they plan on recapturing this opportunity in the future, seeing as Neptulon is the strongest of the elementals and apparently friendly with the denizens of Azeroth, there is a raid to be had here somewhere.
Because as it currently stands, the Plothole is a cataclysmic blunder.