A Kid from the Future

*REWRITTEN* A year has passed since the defeat of Freeza and now a new threat is coming and a warrior from the future warns them about it. But this warrior is…a child? What if Mirai Trunks came to the past at an early age? What if Mirai Gohan was still alive and didn't lose his arm? Get ready androids, a small yet powerful challenge awaits you! Major AU! Rated T for mild language