Here's a very short teaser for The CW's Crisis On Infinite Earths

It’s happening! The multiverse is being disintegrated, entire realities are being wiped out, and it’s going to take nearly everyone who has ever been in a superhero show—CW or not—to prevent the destruction of all life! The five-hour crossover event will begin in early December and will encompass every “Arrowverse” show (Arrow, Flash, Supergirl, Legends Of Tomorrow, and Batwoman), and now we have our first—very, very brief—glimpse of The CW’s Crisis On Infinite Earths in action. The whole thing is 15 seconds long, and that’s including a lengthy pitch for Boost Mobile, so it doesn’t have a ton of stuff, but what it does have is a quick shot of Brandon Routh as a Kingdom Come-style Superman and a bit of Green Arrow and Batwoman with Green Arrow Jr. (Katherine McNamara’s Mia, from Arrow’s flash-forwards), who seems to be wearing something more like a superhero costume than her usual “I’m a cool girl from the future” leather jacket.