User blog comment:IamJakuhoRaikoben/Chapter 255: Fairy Sphere, Review./@comment-251220-20111016004051/@comment-78.251.121.217-20111016192509

Pretty sure they'll stay in the future, the point of this timeskip may be the 7 years and something linked to the dragons : they disappeared in 777, 7 years later, in 784, a dragon, Acnologia, appears and disappears again, and 7 other years later, something else might happen...