User blog comment:IamJakuhoRaikoben/Chapter 499: Gray and Juvia, Review./@comment-27900536-20160830145431

Im not sure if anyone has said anything about the Tenrou tree being connected to the main continent now. Quote from the wiki page " the island bestows divine protection upon those bearing the Fairy Tail crest, making it so that they cannot die while on the island." So if this is the case, Juvia will live, and Irene is the biggest reason Alvarez loses the war.