User blog comment:Miskos3/Fairy Tail 525: Why Did the Emperor Never Love His Child?, Review/@comment-86.70.179.136-20170309161350

Mashima already said it in 2016, the Alvarez arc is the climax of the story, but thinking Fairy is ending is an error, if you read agin this arc, you will see there will be a timeskip and a last arc :

- Lucy and Natsu speaking about what they will do after the war - Lucy saying "see you later" to Brandish - Zeref's speech to Gray.

So I think Alavarez is indeed the end of the main story, but one or two arcs will follow it.