Saiyan's Are Weak!

Strictly speaking, the human Z fighters have been more than sick of being impotent every time a threat to the Earth reveals itself. Propelled by the human drive to succeed and overcome- navigated by the passion for asserting dominance; the (human) Z fighters make a pact to do the 'impossible' : Train until they have found a way to outclass the Saiyan's on the battlefield. A/U or "What If". Starts in android arc, right after Mirai(future) Trunks kills Frieza and king cold, warning Goku about the threat.