I saw it on the official forums way back once azeroth was announced as a titan in the new lore. I think it's possible but most likely not. It is indeed total fan fiction, hard to display sarcasm over text sorry!
There is no way that sargeras gets exhausted by cleaving a planet in two, he has no reason to be injured or weak right now unless we are missing something. Then again, Blizz is kind of hinting that he has no physical form in my opinion so... who knows.