Nunnari to produce St. John's sci-fi spec script

Warner Bros. has snapped up “The Days Before,” a sci-fi action spec by tyro scribe Chad St. John, and set up the project with Gianni Nunnari (“300″) at his Hollywood Gang shingle.

Story centers on aliens invading Earth by traveling backwards through time and wiping out humanity — yesterday by yesterday — while one man stays a yesterday ahead of them, trying to convince the world that the end is coming again.

Craig Flores of Hollywood Gang will exec produce.

Nunnari’s teamed with “300″ partner Mark Canton of Canton Prods. on Greek mythology epic “War of the Gods,” with Relativity’s Ryan Kavanaugh producing and financing. Hollywood Gang and financier Endgame Entertainment recently joined to produce Sergei Bodrov’s period epic “The Silk Road: The Adventures of Marco Polo.”

St. John has previously penned “The Further Adventures of Doc Holiday” for Bruce Willis.

He’s repped by ICM.

Follow @Variety on Twitter for breaking news, reviews and more