From the Washington Post:
The two are well established in the graphic world. Jacobson, 76, the creator of "Richie Rich" series, used to be editor in chief of Harvey Comics. Colón, 75, who drew "Richie Rich" and "Casper" for 25 years, also worked for Harvey before a short stint as an editor at DC Comics -- the home of characters such as Green Lantern, Wonder Woman, Superman and the Flash. He also illustrated for Marvel Comics, where Spider-Man and the X-Men were created.