Although it's certainly no surprise given the immense popularity of the franchise, The Walt Disney Company CEO Bob Iger confirmed today during a Q2 Fiscal 2014 Earnings Conference Call that "at least three" Star Wars films are in development beyond the new trilogy of "Saga" chapters. Up until now, only two of these standalone projects were confirmed.
Referred to in the past as "origin story film[s]", these features are said to be targeting release dates that alternate with the Saga entries, suggesting that these three (presumably the first of many more) will arrive in 2016, 2018 and 2019. Although previous rumors have suggested that these adventures will follow Han Solo, Boba Fett and/or Yoda, nothing specific has as of yet been confirmed outside of Larry Kasdan and Simon Kinberg's involvement on the screenplay side.
J.J. Abrams' Star Wars: Episode VII, meanwhile, is set to star John Boyega, Daisy Ridley, Adam Driver, Oscar Isaac, Andy Serkis, Domhnall Gleeson, and Max von Sydow in addition to original cast members Harrison Ford, Carrie Fisher, Mark Hamill, Anthony Daniels, Peter Mayhew, and Kenny Baker. It will open in wide release on December 18, 2015.