[amjzz]

Originally Posted by Rennir

Not necessarily.

Spoiler for character speculation:

Just because they haven't mentioned a character yet doesn't mean that he won't appear later in the series, neither does it mean that Fairy Tail will end early. I'm thinking the fairy tail might be like bleach and naruto which means that it'll probably go on for a while and eventually have fillers. Who knows? Maybe he will be mentioned later on during the show or during fillers. They might've altered when he gets introduced because they thought he fit better being introduced in another arc.

Spoiler for spoiler about the end of the next arcs:

Then why they didnt did the same for loki?.

In the filler where characters change body natsu felt something wrong with loki's body.

They can easily end the anime at the tower of paradise without leave any plot hole.

They can just say that sieglein is the main antagonist of the anime, make the dragons appear saying something like "all the dragons were hiding until the tower of paradise was activated", destroy the tower of paradise and stop the rebirth of zeref (removing the part where urtear say that zeref was alive).