User blog comment:RennaGraceCarter/Chapter 327 My Part Too - Review/@comment-7418318-20130414064845

I wonder if maybe the Dragons that came through come from a time before there were any Dragon Slayers. If that's the case, maybe they'll only get the idea of creating Dragon Slayers from their meeting with Natsu, Gajeel and Wendy and once they go back to their own time, they'll create the first Dragon Slayers with the knowledge they got from the FT members.

That would be a nice twisted version of a self-fulfilling prophecy.