Ok, so we all know regular Superman and regular Goku is a stomp for Superman, but as soon as Goku goes Super Saiyan it's over. Soooooooooo, I'll shake things up by having Superman sundip for 10 minutes and then fight a Super Saiyan 1 Goku Much fairer fight. So, who wins, SS1 Goku or a Modern-age Superman who's bathed in the Sun for 10 whole minutes?