I've read a few and seen a couple of stories, and I have decided if no one else will, than I must take it upon myself to recreate, The Batman Arkham trilogy, with the Princess of the Night as the Dark Knight. The cast list for this great story will go as followed.
Batman: Luna
Joker: The Mane-iac
Thomas Wayne: Lauren Faust
Martha Wayne: Craig McCraken
Commisoner Gorden: Applejack
Oracle: Apple Bloom
Riddler: Trixie
Bane: Mirrorverse Luna (From the IDW comics)