Humberto Ramos is a Mexican comic book penciller, best known for his work on American comic books such as Impulse, Runaways, The Spectacular Spider-Man, The Amazing Spider-Man and his creator-owned series Crimson.

Mark Waid is an American comic book writer best known for his work on DC Comics titles The Flash, Kingdom Come and Superman: Birthright as well as his work on Captain America, Fantastic Four and Daredevil for Marvel. Other comics publishers he has done work for include Fantagraphics, Event, Top Cow, Dynamite, and Archie Comics.