Annhilation

is a 2019 crossover.

Syponis
After Darkseid, 95% percent of all heroes and humanity disappear, leaving it to the Flash, Green Arrow, Supergirl, Batwoman and Superman to defeat the tyrannical warlord

Cast

 * Stephen Amell as Oliver Queen
 * Grant Gustin as Barry Allen/The Flash
 * Melissa Benoist as Kara Danvers/Supergirl
 * Tyler Hoechlin as Clark Kent/Superman
 * Ruby Rose as Kate Kane/Batwoman