User blog comment:FairyRaven/Fairy Tail Chapter 425: Sabertooth X792, Review and Commentary/@comment-76.121.234.236-20150324105814/@comment-24039250-20150326035007

He'd be riding the revenge train with Gray if it was just for Acnologia. Why unite the guild if you want this to be done by your own hand? It was just one of his leading reasons, this (Gray/Frosch scenario) was likely another.