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