According to film website Deadline.com, Disney has approached Lawrence Kasdan and Simon Kinberg to write subsequent sequels to Star Wars.
If true, this is fantastic news, as Kasdan wrote both The Empire Strikes Back as well as Return of the Jedi (and lest we not forget Raiders of the Lost Ark), and is sure to be a fan-favorite for returning to the Galaxy Far, Far Away! Kinberg is known for his work on X-Men: First Class and its upcoming sequel (X-Men: Days of Future Past), plus the the 2009 Sherlock Holmes film and Jumper.
More news as it develops!
UPDATE:The Hollywood Reporterhas sources saying that Kasdan and Kinberg "have closed deals to write installments of the new Star Wars trilogy." THR goes on: "The pair will write either Episode VIII or Episode IX -- their exact division of responsibilities is yet to be determined -- and also will come aboard to produce the films." This still isn't confirmed, but as Slashfilm notes, "when two Hollywood trades report on it, that’s pretty close."
"[H]iring Lawrence Kasdan and Simon Kinberg to write Star Wars Episodes VIII and XI before any directors are attached at all speaks volumes to how this trilogy is being handled. It seems to suggest that story is king and that’s a good thing."