User blog comment:Miskos3/Fairy Tail 520: Dragon or Demon, Review/@comment-24499036-20170204103840/@comment-7418318-20170204112738

The only thing I can realistically see Jellal doing is suddenly turning up during the fight against August to tell FT the one weakness of August he noticed when they were fighting, but was unable to exploit due to being too wounded.

Or maybe providing Natsu with some fire to eat... but that's about the best I expect, if he turn up at all.