Arrow star Stephen Amell released a teaser trailer for a mystery sci-fi project called Code 8, starring his cousin Robbie Amell and Fast & Furious actor Sung Kang.

“I’ve been working on something. So has Robbie Amell & Sung Kang,” Stephen wrote on Facebook. The footage shows glimpses of Lincoln City, a place where people with “abnormal abilities” make up 60 percent of all arrests. Robbie seems to play one of these superhumans, while Kang is seen driving a cop car before robotic reinforcements descend from a ship.

Very little is known about Code 8, but the Amells first debuted the teaser at the Heroes & Villains Fan Fest in Chicago. “Stephen and I have been trying to work together for a long time,” Robbie said. “We got a little taste of it on the Flash, Arrow crossover, and we’ve been putting this together since August with a bunch of friends and family, and calling in favors.”

The official website features a clock counting down to a reveal on March 22, and an adjoining Facebook page lists Aaron Abrams (Hannibal), Chad Donella (Taken 3), and Alfred Rubin Thompson (Club Dead) among the cast. In a live Facebook video posted back in November, Stephen described the reveal as a “teaser trailer that will eventually become a film.”