MADISON, Wis. — An epic battle between comic book titans will be continued as a judge struggles to decide whether artist Todd McFarlane owes author Neil Gaiman for three characters in the classic Spawn series about a murdered CIA agent who becomes a demon.

U.S. District Judge Barbara Crabb heard Monday from Gaiman, McFarlane and comic book author Brian Holguin but did not rule on Gaiman’s claim that he is owed royalties from three characters — the demon Dark Ages Spawn and two scantily clad female angels. The judge, clad in a dark robe, gave both sides until June 25 to submit additional arguments.