User blog comment:Derax-Pagani/Fairy Tail: Dragon Cry Movie Review/@comment-2214433-20170518100944/@comment-24489996-20170518122518

^^^^^^^^

This.

All you need is a few panels to explain something as simple as a motivation, not full on chapter-after-chapter with Irene and a few other characters. Especially with a person like Acnologia, who we know practically nothing about except being in the 400-year club, a DS turned Dragon, and his vague relationship with Zeref.