"Matthew McGinnis"@en . . "Batman Beyond: Return of the Joker"@en . . . "Matthew 'Matt' McGinnis is Terry's little brother. He's the classic brat when it comes to his brother, and he's an enormous fan of Batman."@en . . "Matt McGinnis"@en . . . . . . . "Matthew McGinnis"@en . "Matthew 'Matt' McGinnis is Terry's little brother. He's the classic brat when it comes to his brother, and he's an enormous fan of Batman."@en . .