User blog comment:Miskos3/Fairy Tail Chapter 326: Natsu vs. Rogue, Review/@comment-5268982-20130405213849

My prediction: Hisui/Arcadios/Datong/Guards will prevent Lucy from closing the gate and lock her up in Mercurius. The Dragons come and mess everything up. That's when Carla's vision comes true, as Lucy won't be able to get out of there and close the gate, thus preventing more dragons from arriving.

Where I base that: Future evil Rogue wants to keep the gate open, so it must obviously stay closed. However I doubt everyone is going to be "nice, let's close this damn thing", and will want to stop Lucy.

Alternatively, Minerva is just that awesome and is mind messing with Lucy.