Next Simpson character is......

i don`t disagree with you but if he was retired in the show then i would have to say he is retired in the Simpsons universe no matter what the media. Hey maybe i am wrong and they surprise me with one of those characters being released.

They had them post Hartman death in action figures and comic books so not really the universe retired, only the animations. I don't know where TSTO stands on that though so I think we can only say they might be in it or they might not be!

Characters I think they can use before it gets ridiculously obscure are the following (although some might think some or even all are obscure):

Helen Lovejoy
Judge Roy Snyder
* Simpson
Maggie Simpson
Sarah Wiggum
Bernice Hibbert
Gil Gunderson
Sideshow Bob
Dr. Marvin Monroe
Crazy Old Man/ Jewish Old Man
Miss. Hoover
Lunchlady Doris
Bill & Marty
Rabbi Krustovski
Jacqueline Bouvier
Snowball II
Lionel Hutz
Artie Ziff
Dewey Largo
Leopold
Uter
Manjula
Troy McClure
Roger Myers
Crazy Cat Lady
Brandine Spuckler
Yes Guy
Wiseguy
Dave Shutton
Richard & Lewis
Dr. Pryor
Ruth Powers
Janey Powell
Herbert Powell
Lindsay Naegle
Bleeding Gums Murphy
Ms. Muntz
Cookie Kwan
Jacques
Judge Constance Harm
Mrs. Glick
Baby Gerald
Ernst & Gunter
Database
Mr. Costington
Wendell Borton
Blue Haired Lawyer
Benjamin, Doug and Gary
Ms. Albright