Bayonetta
Hideki Kamiya has stated that he would like to develop a Bayonetta spin-off game starring Jeanne for the Nintendo 3DS.

"Given the chance, I’d like to make a game based on Jeanne from Bayonetta. Something that’s not as big in scale. Something that’s portable, that you could play in quick sessions, where she’s a history teacher and the kind of fun things that could come out of a scenario like that.”
Contributed by CLXcool
Bayonetta was going to be included in the ##Sega## crossover kart-racing game Sonic & All-Stars Racing Transformed as a playable character, but according to a forum post from the developers, she was scrapped because the developers had trouble trying to keep her in-character without the ESRB/PEGI rating potentially going up.
Contributed by DrakeVagabond