Absolutely loved the idea that instead of the dragons disappearing 14 years ago that the dragon slayers were sent through time. This would explain why both Gajeel and Natsu could not pass the barrier that prevented people older than 80 from coming through the gate (when Laxus was doing his thunder palace thing with the guild). This is what would also explain the logistical problems I have with the timeline and dragon slayers.
I was one of the people saying every chapter that the dragons would come from the gate, so I was glad that Lucy was right to try and close it. I really hope Lucy closes the gate. This will be good for all in my opinion. This way, we have a handful of dragons for the characters to fight, and the world might not be destroyed. I don't know why anyone would want the future that future Levy was describing. Really, I'm not a fan of the only motivation for a character being surviving.
Very good chapter