The flier that Dolores gives Ito is of "Congo Bill".
In the DC Comics, Congo Bill is a superhero who became a globe-trotting adventurer who grew content in Africa, swearing to protect it from harm. His witch-doctor friend Chief Kawolo gave him a magic ring that would transfer Bill's consciousness into the body of the legendary Golden Gorilla. He decides to use his new powers to fight crime in the jungle as the hero Congorilla. He later teams up with Starman and a full-time member of the Justice League.
Congo Bill was adapted into a 15-chapter movie serial by Columbia Pictures in 1948.
The character has been associated with the Ultra-Humanite in the past, as he appears in a Young Justice tie-in comic book series as a gorilla deity who escapes experimentations by the Brain and Ultra-Humanite.