User blog comment:FairyRaven/Fairy Tail Chapter 425: Sabertooth X792, Review and Commentary/@comment-24039250-20150326034121

First thing about Avatar....I don't believe they are actually powerful...other then Gray. My reason is because Avatar is suppose to foreshadow a future threat. The threat of course being the "Avatar"-a god like figure, which in this case is Zeref. How is this a foreshadow threat when we know Zeref will be a threat? Answer: It foreshadows the unification of the Dark Guilds that worship Zeref to ally themselves with him for the inevitable Final Battle where every Dark Guild unites with Zeref against all the Guilds of Light. The final Arc needs an epic battle and this could be how it's done. It'd make sense, and Zeref can even create some demons (or a Nemesis demon army) to make things interesting in the battle as well. This is my prediction for the future of the series. Also this way when all is done and Zeref is beaten so are all of the Zeref worshipers, which will extinguish all of the darkness in the world (well almost all since Zeref is the source of most/all evil acts in the world indirectly or directly), which is what Zeref wants.