User blog comment:FairyRaven/Fairy Tail Chapter 437: Magnolia, Review and Commentary/@comment-103.14.62.4-20150526222218

No way Doranbalt is the next master. He shared no bond with the rest of the guild.

My bet is Erza, Mira or Lucy in that order.

Maybe Natsu.. He's human side as master of FT and he's demon side as master of Tartarus.