User blog comment:Miskos3/Fairy Tail Chapter 486: The Fourth Guest, Review/@comment-27792306-20160523175101/@comment-24734624-20160525184452

I think August will tell Natsu, Brandish, Lucy and Happy about Acno's current location. Memories of Igneel's death consume Natsu, he'll loose his shit and enter Dragon Force, ditch the others and go after Acno. Natsu will meet Irene. Her scent will remind him of Erza, like how Silver's reminded him of Gray. Both will ask each other about their associations with Erza. Irene will reveal hers and Natsu will PoF her. They'll team up on Acno, but Zeref, disappointed in Irene, will open the Book of E.N.D., Natsu becomes E.N.D., and E.N.D. burns Irene to death and scares Acno away, leaving Sabertooth, Blue Pegasus and Gajeel's team to deal with E.N.D.