Originally Posted by Sorata

And from that he can't assume Gotenks power.



I know he said that but I think he didn't have any idea if Gotenks would grow to his expectations.

I would like to see everyone faces if Goku would say the opposite. Try to put yourself in his boots. He had to convince everyone that the boys have the potential to become guardians of the Earth. He couldn't admit that he doesn't have a clue how powerful really Gotenks would be.