Goku only uses the Super Kaio-Ken in DBZ once, but it's made several expanded universe appearances, such as a tool in Xeno Vegito's arsenal or the video games' Super Saiyan 4 Kaio-Ken combo. Goku ...

Xeno Goku, Xeno Vegeta, Xeno Vegito, Broly, Beat, Note, ... However, it’s even more exciting to witness Super Saiyan 4 Kaio-Ken absolutely decimate the competition in Super Dragon Ball Heroes.

Seeing Goku and Vegeta meet their Xeno counterparts is going to be fun – as will seeing SSJ4 Vegito on the battlefield. The Dragon Ball Heroes promo anime airs new episodes online.

That belongs to Xeno Goku and Xeno Vegeta as the pair are about to level up their Super Saiyan 4 forms. As you can see below, the new Dragon Ball key art shows off the Xeno fighters front and center.