User blog comment:FairyRaven/Fairy Tail Chapter 435 & 436: The Cry of Victory & Memoirs, Review and Commentary/@comment-112.210.161.150-20150519041321/@comment-7418318-20150522194505

For Exceeds there is one (or rather two I suppose) things left to see: Happy and Carla learning who their parents are. Not much to "learn" there, but certainly something I'd like to see.

No foreshadowing doesn't mean it won't happen. There was 0 foreshadowing that Doranbolt is a Fairy Tail member and yet he was. Not that I'm arguing that Layla will be here, just saying that lack of foreshadowing doesn'T necessarily mean it won't happen.

I think people believe that Layla will make a comeback because they want to see her and they want to have the mysteries around her resolved. She died on the same day the Dragons went into hiding, she died mysteriously and she knew at least something about the One Magic, whatever that'll turn out to be.

That's not just one, but three so far unresolved mysteries... four if you split the One Magic into "What is the One Magic" and "How did Layla learn of it". And unresolved mysteries make people curious.