The manga Fairy Tail saga ( Fairy Tail: 100 Years Quest anime adaptation . According to information published on designer Atsuo Ueda Twitter .

Check out the teaser revealed that confirms the adaptation for a TV series:
Synopsis:
After Acnologia and Zeref, Fairy Tail became stronger and more energetic! Natsu and her friends went in search of the 100 Year Quest. Will something new happen?!
The manga is written by Hiro Mashima and illustrated by Atsuo Ueda . It is a direct sequel to Mashima's main series, focusing on Natsu Dragneel and his team from the titular sorcerers' guild as they aim to complete an unfinished century-old quest.
The manga was eventually released on Kodansha's Magazine Pocket manga app in July 2018 and was licensed by Kodansha USA for an English-language release in North America. As of July 2021, nine tankōbon volumes have been released in Japan.