User blog comment:Sargenttacos115/Natsu and Gajeel age Theory/@comment-108.250.20.180-20131117185004/@comment-7418318-20131117192525

You're mixing up the two futures. Future Levy came from the timeline where the 10.000 Dragons devastated the world.

Besides she was pretty messed up, with scars all over her. She probably survived, because she was burried below debris and the Dragons didn't check under each stone for possible survivors.