Wells is an Emmy and Annie Award winning writer and actor for the TV show Robot Chicken, including the Emmy-nominated Star Wars Episode II.
Wells has written numerous titles like Heroes For Hire and Young Avengers/Runaways and various Spider-Man titles and in 2006 signed an exclusive contract with Marvel. He then wrote Venom: Dark Origin telling the origin of Eddie Brock and the Symbiote, as well as the Dark Reign: Elektra tie-in series.
He is currently writing New Mutants with artist Diogenes Neves, including the crossover with Necrosha. Being published in parallel with that series is Amazing Spider-Man Presents: Anti-Venom - New Ways To Live.