User blog comment:Belanderanime/Question about the 3 FUTURES, 10 000 dragons PLEASE HELP!!!!/@comment-7418318-20130707183624/@comment-7418318-20130707211531

They come from two different timelines.

In F-Lucy's timeline there were 10.000 Dragons.

In F-Rogues timeline there were no Dragons except for Acnologia (and maybe Igneel, Metallicana and Grandeeney, but they were never mentioned, so they either stayed hidden or were killed by Acnologia).

Maybe this helps.