I thought this game might work. The player holding the chair selects a character. The challenge for the other players is to guess who the character is. They get twenty questions.
All questions have to have to be framed so as to allow the answer "Yes" or "No". The chair can give extra information if he or she chooses, and frame an appropriate response if neither answer fits.
Players may only ask a fifth consecutive question if four hours have passed since their last one. (Since the guess, not the answer.) The first player to guess the answer takes the chair.
Only characters that have made at least two appearances are eligible. So Franklin Storm is, but not Tomazooma. Only characters that first appeared in US comic books are eligible. So not Captain Britain, Dick Tracy, Tarzan, Thor.
(revisions made to rules)
These are the characters featured so far:
The current round commenced p.32.