Super Saiyan 4 doesn’t turn Goku back into an adult. Dragon Ball Daima episode #18’s interpretation of Super Saiyan 4 is probably the most organic way that it could have been brought into canon.

Raditz is Goku’s brother and a key part of the Saiyan legacy, it’s time Dragon Ball Super revives him with a powerful, unique ...

Super Saiyan 4's revival in Dragon Ball DAIMA surprised a lot of fans, but it still couldn't manage to match Ultra Instinct's hype.