User blog comment:The Wikian Who Has Long Since Forgotten His Name/What if Raditz has taken Gohan and raised him as evil and then Gohan came back for revenge?/@comment-3508703-20131006181440

That is a very interesting question. I do not think Goku would be able to kill Gohan as he has not killed anyone in the entire series up until the Buu Saga. Vegeta Nappa and Raditz would most likely destroy all earthlings including the Z-Fighters unless they do something special with the Dragon Balls. But who knows what would happen lol.