to the box office failure of the fourth film and legal troubles, the Salvation trilogy was ultimately cancelled. William Wisher, who co-wrote the first two films, had written material for a potential Terminator 5 and Terminator 6 that would follow on from the events of Terminator Salvation. The two-part story would involve an element of time travel that brings back the deceased character of Sarah Connor, allowing her to interact with Kyle Reese beyond their initial meeting in the first film. Schwarzenegger would also reprise his role for the sixth film. The films would also include new Terminator villains from Skynet. Wisher had written a 24-page film treatment for Terminator 5 and a four-page concept outline for Terminator 6. Terminator Genisys trilogy By December 2013, there were plans for Terminator Genisys to be the start of a new trilogy of films. In September 2014, Paramount announced release dates for the two Genisys sequels: May 19, 2017 and June 29, 2018. Terminator Genisys producer David Ellison described the film and its intended trilogy as standalone projects based on Cameron's original Terminator films. Ellison said Terminator Genisys is neither a sequel or a prequel to the previous films, saying: "For us this is Terminator 1, this is not Terminator 5". The sequels to Genisys were tentatively known as Terminator 2 and Terminator 3. The two sequels were to be filmed back to back during nine months of continuous shooting. The storylines for the two sequels were devised by Genisys writers Kalogridis and Lussier. The trilogy was being planned out before Terminator Genisys began filming, as producers David Ellison and Dana Goldberg wanted the full storyline finished ahead of time rather than having to "figure it out as you go along", stating: "We spent a lot of time breaking that down, and we do know what the last line of the third movie is, should we be lucky enough to get to make it". Production on the sequels was contingent on whether Terminator Genisys would be successful; development of the trilogy stalled in 2015 after the film's disappointing box-office performance. The planned sequels were ultimately cancelled, with Terminator 2 being removed from Paramount's release schedule in January 2016. The new trilogy would have explained who sent Pops back in time to protect Sarah Connor. In February 2015, Schwarzenegger said he would reprise his role as Pops for the second film in the trilogy,