No Prep Time
Setting Village Hidden In The Rain
Yeah, Hanzo beat the young sannin, albeit lost to Pain. But Kisame isn't Pain. Hanzo should take this battle.
Even then I believe it was stated that Hanzo only really lost so easily because his skills had become massively dull. Hanzo was a very powerful ninja in his prime.
@eddz99: Well that's hard to say.
Pein outright stated that he would've lost to Jiraiya if he hadn't caught him by surprise however Jiraiya was likely a lot more experienced and had his sage mode when he fought the 6 paths of Pein compared to when he fought Hanzo.
Personally I believe a prime Hanzo would lose to Pein but it would be a close fight, not a breeze like how it was when an out of form Hanzo fought Pein.