ULTIMATE Marvel vs Capcom 3...!? FUUUUUUUU-

[Rökkan]

Zero is a lot more connected to Bass, since it was created by Wily, based upon what he learned from studying Megaman, the Fortenium/Bassnium energy source and the failure on Bass. Like Bass, he was trying to design the most powerful robot. Protoman was build by Wily and Light. Unless you're talking about character role, then Zero is a lot like Protoman, yes.