Batman/The Simpsons

Heroes
Bruce Wayne/Batman as Homer Simpson

Dick Grayson/Robin as Bart Simpson

Barbara Gordon/Batgirl as Lisa Simpson

Terry McGinnis/Batman Beyond as Santa's Little Helper

Officer Renee Montoya as Elizabeth Hoover

Villains
The Joker as Mr. Burns

Selina Kyle/Catwoman as Marge Simpson

Harvey Dent/Two-Face as Apu Nahasapeemapetilon

Dr. Pamela Lillian Isley/Poison Ivy as Maude Flanders

Dr. Johnathan Crane/the Scarecrow as Ned Flanders

Waylon Jones/Killer Croc as Nelson Muntz

Mary Dahl/Baby Doll as Jessica Lovejoy

Any more idess?