Do you want to compare Uncle Sam with Mister Sinister? Discover the powers, weakness & weapons of Uncle Sam and Mister Sinister from Uncle Sam Biography and Mister Sinister Biography. Find out all about Uncle Sam and Mister Sinister.# Check out how is Uncle Sam unique and distinct from Mister Sinister. Discover their love interest, sidekicks, family tree and the movies and games list in which Uncle Sam and Mister Sinister have appeared. Find out everything about them here!