I hope you have something in mind to keep Krillin relevant, too. He's already bald, and you've done both the cyborgisation and Saitamising processes once already, so like a true Mad Scientist, you're going to come up with something new for him, right? And although the Saiyans ended up hogging the spotlight and making literally every other Earth fighter irrelevant, I hope you're not going to take that out on the sweet little kid that is Goku at this point.
Plus, I wanna see you turn this multi-species vague alliance into an intergalactic empire, and you'll never be able to be free of rebellions if you go all Earth First, so you're going to have to integrate aliens at some point. May as well start with the ones you know you can trust. And you can sell this first wave to the others with the fact that they were also raised on Earth. Little steps.