User blog comment:Skitzo1/A Natsu - Zeref theory/@comment-5552025-20130106120652

I heard a theory that the Zeref on Tenrou Island wasn't Zeref, but rather future Romeo (or anyone in Fairy Tail, really). It seems a bit farfetched, but it's pretty similar to yours. Maybe the Zeref there isn't the real Zeref, because why would he cry and mope over Natsu not being able to defeat him if he was the real Zeref?

Then again, what if that Zeref really is the real thing, and something worse than him is going to show up (maybe Acnologia, or worse)? It would make for a great plot flip at least.