User blog comment:FairyRaven/Fairy Tail Chapter 327: My Part Too, Review and Commentary/@comment-121.54.8.130-20130412212742

As i thought, Lucy is sane. She has been thinking a lot when she saw that door. Although i didn't predicted the thing about Crux researching about Eclipse. Now, why did Future Rogue lie to the princess? My guess would be that in his timeline, the dragons are back to being the boss on Earthland, and Rogue has an ambition to be the next Dragon King by doing what the human Acnologia did before. I think using too much dragon slaying magic has a side-effect also in which a human can turn into a dragon himself. Zeref has nothing to do with this, maybe. Rogue came from the future to ensure the door will be opened with no interference so that his ambition will be fulfilled. Everyone is free to speculate/guess right? :)

-red