With a Batgirl movie and a Gotham City Sirens movie both on the way, it stands to reason that the DCEU will want to introduce the Oracle version of Barbara Gordon at some point.
If the Batgirl solo movie is going to give us a version of Babs who can kick some serious ass as a street level vigilante, then an adaptation of The Killing Joke could pave the way for her to become the tactical and tech-savvy hero that all know and love.
While Batgirl is already an icon in the realm of DC Comics, Oracle has arguably become an even more famous and iconic hero for her strong and empowered depiction of the disabled community.
After all, with characters like Huntress and Black Canary acting as the muscle for the Birds of Prey team in Sirens, someone will need to be the brains of the operation when they go up against Harley Quinn, Poison Ivy and Catwoman.