OK before you freak out, Chris Pine has not been officially confirmed for the cast quite yet. As we all know, his character Steve Trevor — Diana's (and our) one true love — dies at the end of the first film in a heroic act that saves both his friends and the rest of humanity.
That being said, Jenkins has described the sequel as "a great love story," and hinted that he could be back. "All I can say is it was a dilemma," she told Fandango. "It's something I hope we don't talk about in the public [because] I want people to see, but it's very hard to know which characters will be in the next movie because of the time period, so it's a big question."
Unless someone in the DCEU brings him back from the dead or travels through time to save him, his role will likely be limited to flashbacks, or he could always show up as Steve's descendant. Either way, we have a feeling we haven't seen the last of Pine.