Although she could very easily debut in the upcoming solo Batman movie, the female-centric nature of the Harley Quinn solo movie would similarly offer a perfect opportunity to introduce Barbara as either Batgirl or Oracle — we’re specifically partial to the latter.
Ms. Gordon would make a strong addition to the Harley Quinn film because her strategic, calculated, and generally level-headed decision-making abilities would nicely balance out the more erratic and chaotic nature of the film’s titular villainess.
Many fans were incredibly disappointed to learn that Barbara Gordon would not appear in Batman V Superman: Dawn of Justice, but hope remains strong that she’s out there somewhere in the DCEU.
Beyond that, Oracle has become an icon in the disabled community in the years since her debut, and it would simply be awesome to see that inspirational tale translated to the silver screen properly.