Lee has to be completely destroyed by Kimmo, or it wouldn't make any sense.

Kimmo is suppose to be stronger than Kabuto, and just below the legendary 3 and the kages.

How does it make sense that Lee can beat someone who is slightly above the level of Kakashi?

I can see Naruto beating Kimmo, if he pulls out that giant toad and goes berserk, but only Naruto.