The Best in the Multiverse (2020)

The Best in the Multiverse is a cancelled arc that takes place in 2020. It focuses on the rivalry between Sora no Kuroninja and Solar Kuroninja. The story can be found here.

Synopsis
''A fight between two rivals from two different Earths creates a rift of chaos, which inspires the Interdimensional Guardians to create a tournament in hopes of containing the energy in one place and deciding who the strongest in the Multiverse is. However, one of the evil Interdimensional Guardians has other plans for the tournament.''

Interdimensional Guardians

 * Horologius
 * Agemo

Villains

 * The Collectorer
 * Dark Kuroninja
 * Gaisorg
 * Xxarxaxxiox