Revive Uchiha Madara from the Start

Bleach: I, Yhwach, deserve the Soul King's throne.

One Piece: I, Blackbeard, am the true ruler of this world.

Naruto: I, Uchiha Madara, have been revived, and at full strength, I am invincible.

Fairy Tail: I, Zeref, must destroy the world.

These are stories of villains revived in four worlds, and of heroes gathering to create a moving tale worthy of song.

Ichigo, Naruto, Natsu, Luffy, set sail!