User blog comment:Miskos3/Episode 275: Fairy Tail Zerø: An Eternal Adventure, Review/@comment-5894890-20160312181503/@comment-5894890-20160313175758

Ohh, I see. Regarding that, they could do it I guess, but I don't really see it happening. Gray hasn't really been a predominate character lately (later on he probably will be though; with him having to deal with END). Anyways, despite him having a manga of dedicated to his childhood (plus Mashima only co-writes? this), I think if anything, Natsu or Lucy's story would come first.