Efron has made a separate deal at Warner Bros to star in a Back To The Future-like film that melds two projects. One’s a pitch from writers Tim Calpin and Kevin Jakubowski, and the other is a WB project called Algorithm that the studio was already developing as a directing vehicle for Nick Stoller, the Forgetting Sarah Marshall director who just wrapped Get Him To The Greek. Mark Gordon and Bryan Zuriff are producing and Alan Riche is exec producer along with Efron and Barrett.
http://www.deadline.com/hollywood/exclusive-zac-efron-picks-pair-of-projects/