User blog comment:Jho5689/Fairy Tail 337 and onwards/@comment-11232389-20130625163146/@comment-1776824-20130625165302

Sorry, but your space-time logic is flawed. At the point we're witnessing, Zirconis already died, but for time to flow normally, Zirconis must go back to the past and die (Zirconis came BEFORE he died in the past, meaning that Acnologia had not, or was in the process of ascending, ascended to power). You see, without Zirconis dying, all of time is essentially doomed, as Team Natsu would never have been told of Acnologia's history, Lucy would never have been arrested, and therefore Natsu would have participated in the last day of the GMG, allowing Future Rogue to essentially destroy everything without a fight.