This is a match up that I think might actually appear in the manga since Suigetsu wants Kisame's Samehade.

Since Suigetsu can turn into water and Kisame loves water techniques I think it would be a very interesting match up. We still don't know very much about Kisame as we haven't seen him fighting at 100% and for Suigetsu we know how he can manipulate his body to turn into water and also he can enlarge different parts of his body to increase his strength. At this point in the manga I think Suigetsu is a little too hot headed and immature to take out Kisame, but maybe by the time they fight he will have matured.

What do you guys think?