Can your fate ever change?

My first AU. The saiyans believed Bradock and prevented Freeza from destroying their home planet. Yet it's not a happy ending as the tyrant himself stayed alive and a war broke out between the saiyans and his army. With the king dead, Vegeta was crowned as King. Goku was sent to Earth as planned, but one day Radditz will come for him, forcing him to return. What will happen now? :)