User blog comment:Axlorg89/Fairy Tail Filler Arc Incoming *Updated*/@comment-2125188-20140924173226/@comment-2125188-20140924195442

Well one can assume that he approved it in some form or another, given though he referenced it the manga. I'm sure he would've at least approve certain aspects of the arc such as bringing back oracion seis. This is only my personal guess, but i assume that he would've been in charge of character design and rough plot, just like this arc. The character design part was confirmed (he designed halphas and reborn oracion seis). Hiro Mashima didn't have a official twitter before the Key of the Starry sky arc started, so that's why so little information about the arc has been ever been mentioned about it. I don't see why Hiro would not at least provide a rough plot for this upcoming arc, but not Key of the Starry sky.