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