Disney/LucasFilm Planning Fourth "Star Wars" Trilogy Already?

An insider over at LucasFilm/Disney have revealed that the studio are already planning a fourth trilogy of the "Star Wars" franchise. The plan is to bring back Darth Vader, but in the early days of him becoming a Sith Lord. The insider also revealed that the studio plan to bring back other classic characters in younger forms and in other ways too. So we could see a young Han Solo or a very young Luke Skywalker also.
I like the idea of seeing the rise of Darth Vader once he became a Sith Lord. So the films would act as a 3.5 to "Revenge Of The Sith" and would set up the pre-"A New Hope" story line.