User blog comment:FairyRaven/Fairy Tail Chapter 416: Tartarus Arc: Final Part, Review and Commentary/@comment-24546844-20150119160603/@comment-9595671-20150119170753

It kinda seemed like their boobs were a bit bigger, and if a Timeskip is coming up (Natsu's training journey seems like proof to that) then that kinda makes sense since Mashima might be adjusting to the changes he'll have to draw for the characters.

Well considering he was in the new magic council and how Grimoire Heart appeared right when he was "infiltrating" them right as they showed up, I'm starting to think there's some connection going on. I just don't know what it is yet, but with what we learned about Natsu *looks left and right* well that alone is making something feel off about why Igneel couldn't beat him