Obviously, Splatoon 2 is not really a fighting game (even though the Inklings are being represented in Super Smash Bros. Ultimate). Still, when an announcement is made that the Spirit Bomb from the Dragon Ball series is coming to the title, it tends to catch our attention.
More specifically, it’s being referred to as the “Booyah Bomb.” This attack can be charged faster by allies who signal with the “booyah” command. It’s a shame that Cyborg from the Injustice series (or rather, the D.C. Universe) isn’t present to help considering his affinity with the lingo.
Notably, the Spirit Bomb is an attack that is utilized by Base Form Goku in Dragon Ball FighterZ. Under certain conditions, the Super Saiyan variant of Goku can actually defeat Kid Buu with a special Dramatic Finish animation with this super powerful technique.
In Dragon Ball FighterZ, the level 3 super is merely a super slow attack that deals massive amounts of damage. There’s no mechanic that has allies “lending” their energy to charge it. While it could work in the 3v3 fighting game, it’s hard to imagine it not being limited in a scenario where Base Form Goku’s allies are already defeated.
While there’s no official confirmation on this, it’s easy to see where the inspiration of the Booyah Bomb is coming from. Unfortunately, the Inkling’s Final Smash in Super Smash Bros. Ultimate has already been revealed to be the Killer Wail.
Being that the newest entry in the Super Smash Bros. series is being released on December 7, 2018, it’s probably too late to see something like this get incorporated. Assuming Super Smash Bros. Ultimate isn’t the last in the franchise, we could possibly see this as an item or Final Smash some day… It might be the closest thing to getting Goku in Smash.
Source: Nintendo VS via Comic Book.