User blog comment:FairyRaven/Fairy Tail Chapter 438: The Seventh Guild Master, Review and Commentary/@comment-7070784-20150601114438

So I guess we can still say that the fairy tail guild is still not officially formed, according to levy paperworks must still be be approved, but thanks to mest, it seems like a new arc will start and i think once the main cast returns from saving makarov, the new guild building is already finished and the guild paperworks are already approved by the magic council, maybe by that time erza will pass on the title of being the guild master to someone else XD.