The Man-Thing (real name Dr. Theodore "Ted" Sallis) is a chearacter from Ultimate Spider-Man. He is a scientist who was mutated into an empathetic swamp monster with mystical abilities.
He is a member of the Howling Commandos who teams up with Spider-Man and his team of S.H.I.E L.D. recruits to defeat Dracula and stop him from making the world descent into a vampire apocalypse