User blog comment:Natsu11/Zeref and Natsu?/@comment-123.176.16.2-20130525111339/@comment-7418318-20130525124643

A few problems with that.

1) When Wendy met Porluscia the first time, she was immediately reminded of Grandeeney. That wasn't the case with Natsu and Zeref.

2) People born in Edolas have no inherent magic and need to rely on magic items. Zeref pretty clearly has magic in his own body.

3) Dragon countepart or not, Edolas people still age normal, but Zeref is more than 400 years old and according to himself he was awake the whole time (so no timetravel or statis).