Variety reports that Star Trek star Chris Pine is in talks to play Steve Trevor in 2017’s Wonder Woman. Scott Eastwood was previously rumored to be playing the role in Suicide Squad, and Variety has more info on that story:
Rumors had suggested that Scott Eastwood had landed the part, but insiders tell Variety that Eastwood was given a choice to test for the Trevor role or sign on for a guaranteed supporting part in “Suicide Squad,” which he opted to take.
In the comics, Steve Trevor was an intelligence officer in the United States Army during World War II whose plane crashed on Paradise Island, the isolated homeland of the Amazons. He was nursed back to health by the Amazon princess Diana, who fell in love with him and followed him when he returned to the outside world. There she became Wonder Woman (and also his co-worker, Diana Prince).
Wonder Woman is being directed by Patty Jenkins and hits theaters on June 23, 2017.