I don't get this argument, we've been seeing Mihawk first hand in real time, we've been seeing what he's been getting, why do you need to see Xebec from 50 years ago lmfaoooo.
Even now this is all just Shanks hype really if you think about it, Shanks took down Loki, Harald who got defeated by Loki is sharing a CoC clash with Xebec like they are PrimeBeard and Roger. It's always Shanks Oda is making look good.