At the 2019 Geneva International Motor Show, Pagani showed us various early sketches of the car that would become the Zonda, including one design that featured twin movable wings, detailed here.
When I asked why the production Zonda never got this active aero feature, Pagani joked that he had an American investor that fell through. Active aero was a hot new technology on performance cars in the early ’90s when the Zonda was being developed. The 1986 Lancia Thema 8.32 was the first production car with a deployable spoiler; the 964-generation Porsche 911 got one in 1989. The VW Corrado, the R31-generation Nissan Skyline, the Mitsubishi 3000 GT and the McLaren F1 (among others) all sported motorized spoilers, though none were quite as large as what was envisioned for the Zonda. Pagani finally got his wish with the Huayra in 2011, which has movable ailerons at the front and rear to control the aero balance of the car.