User blog comment:FairyRaven/Fairy Tail Chapter 429 & 430: Code Blue & Purification Ritual, Review and Commentary/@comment-25111584-20150420103329/@comment-1359322-20150420104409

Mashima did say it'll be the Fairy Tail Revival Arc, so it's bound to be something along this line. That aside, from the current pace i guess Avatar will only be prominent for 2/3 chapters i suppose. Without Gray and Goumon, Avatar has 6 named members left after all.