User blog comment:IamJakuhoRaikoben/Chapter 464: Natsu vs Zeref, Review./@comment-96.250.83.196-20151201001002/@comment-5894890-20151201033834

I actually think that would be pretty interesting. If it's true, I can see a story where Lucy does the same thing, and sacrifices her life to seal END and revert Natsu back, but permanently. Well, maybe she lives, but I can see a emotional story involving Lucy and Natsu in this case.