User blog comment:IamJakuhoRaikoben/Chapter 366: 1000 Souls, Review./@comment-5303512-20140109175213/@comment-5303512-20140110023538

Well here are the problems I have with other theories.

1. Everything that has happened with time travel that he might be future Gray would be ridiculous because with the destruction of the Eclipse Gate the time should have been "to a certain degree" restored as in all people from different timelines return to their times.

2. Being a relative of Gray is unlikely, when Deliora attacked he said both his parents are dead, and he failed to mention about having a brother or something.

3. Natsu smelling someone familiar, don't you think he would have found Gildarts similar to Cana?

4. This is a world of magic, as the saying goes, anything is possible.