It may seem like a problem that Goku has obtained Super Saiyan 4 before Dragon Ball Super, but there's actually a convenient ...

Dragon Ball's Gohan has more than a few forms he uses as a staple Z-Warrior, with his future alternate timeline self getting a Super Saiyan 2 upgrade.

fans have seen Gohan toss aside his glasses when using the Super Saiyan form. It was implied that Gohan took these glasses off because his vision had improved in the moment, but thankfully it now ...

Gohan was already much stronger than Cell when he was at Super Saiyan 2, and the gap now is much wider.