As part of Lab Zero Games' efforts to bring Skullgirls Encore to PlayStation 4, the developer has been looking into ways to bring PlayStation 3 arcade stick support to the next-gen version. Interestingly, the studio appears to have made actual progress.
A new video uploaded by lead developer Mike Zaimont reveals a custom USB driver uploaded into the current Skullgirls Encore PS4 build, which allows previous-generation arcade sticks to be used flawlessly. The driver will only work with arcade sticks, since it identifies them as a generic third-party USB joystick, so don't look for DualShock 3 controllers to work here. Of course, any DualShock 4-exclusive features, like the Home and Share buttons, will still require a PS4 controller for use.
The full video can be seen below. Marvel as Zaimont institutes the kind of backwards compatibility that next-gen fighting games like Killer Instinct have yet to pull off.