Episode VII has only just started filming, but the Episode VIII stories have begun already. This is from ComingSoon.net ...
Rian Johnson to write Star Wars Episode VIII
In a major update to the future of the Star Wars saga on the big screen, Deadline is reporting that Brick, Looper, and The Brothers Bloom helmer Rian Johnson is making plans to write and direct Star Wars: Episode VIII. Although the outlet is also reporting that he'll direct Star Wars: Episode IX, TheWrap claims that Johnson will only provide a treatment for the saga-finale and that a director for that final film has not yet been decided on. We'll update with official word as soon as it's available.
Johnson joins a seemingly ever-growing slate of top directors that are setting lightspeed coordinates for a galaxy far, far away. J.J. Abrams is currently filming Star Wars: Episode VII while both Gareth Edwards (Godzilla, Monsters) and Josh Trank (Chronicle) are planning to helm solo films. The plan is for a new Star Wars film to hit every year beginning with Episode VII on December 18, 2015.