User blog comment:Woohoot/Future Lucy and future Rogue timelines/@comment-10543621-20130607083622/@comment-1359322-20130607090018

I believe it to be something like this, the kingdom open the gate and brought 10,000 Dragons. Future Lucy came back in time and warned everyone about the Dragons and they didn't open the gate but got ruled by Acnologia, F. Rogue goes crazy and decide to go back to the past to kill Lucy (unaware that Future Lucy was the one who warned them about the Dragons). And then the current timeline.