A few days ago, the executive producer on the animated Star Wars Rebels series, Simon Kinberg, mentioned that only the movies would be canon for Star Wars.
Now, StarWars.com and Lucasfilm president Kathleen Kennedy have confirmed the news and announced the preceding Star Wars Expanded Universe would be referred to as "The Legendary Star Wars."
This is pretty much what George Lucas has been saying all along: that none of the novels are considered canon, and just the movie related Star Wars projects (and Clone Wars) are canon. Timothy Zahn, writer of the Thrawn Trilogy, said the same in a previous interview: "The books were always just the books."
It is said, however, that going forward all aspects of Star Wars storytelling moving forward will be connected.
They also confirmed that under Kathleen Kennedy's direction, Disney for the first time ever has formed a story group to oversee and coordinate all Star Wars creative development.
"We have an unprecedented slate of new Star Wars entertainment on the horizon," said Kennedy. "We're set to bring Star Wars back to the big screen, and continue the adventure through games, books, comics, and new formats that are just emerging. This future of interconnected storytelling will allow fans to explore this galaxy in deeper ways than ever before."
Here's the relevant info:
[George] Lucas always made it clear that he was not beholden to the EU. He set the films he created as the canon. This includes the six Star Wars episodes...
Now, with an exciting future filled with new cinematic installments of Star Wars, all aspects of Star Wars storytelling moving forward will be connected. Under Lucasfilm President Kathleen Kennedy's direction, the company for the first time ever has formed a story group to oversee and coordinate all Star Wars creative development.
In order to give maximum creative freedom to the filmmakers and also preserve an element of surprise and discovery for the audience, Star Wars Episodes VII-IX will not tell the same story told in the post-Return of the Jedi Expanded Universe. While the universe that readers knew is changing, it is not being discarded. Creators of new Star Wars entertainment have full access to the rich content of the Expanded Universe. For example, elements of the EU are included in Star Wars Rebels. The Inquisitor, the Imperial Security Bureau, and Sienar Fleet Systems are story elements in the new animated series, and all these ideas find their origins in roleplaying game material published in the 1980s.
Demand for past tales of the Expanded Universe will keep them in print, presented under the new Legends banner.
On the screen, the first new canon to appear will be Star Wars Rebels. In print, the first new books to come from this creative collaboration include novels from Del Rey Books. First to be announced, John Jackson Miller is writing a novel that precedes the events of Star Wars Rebels and offers insight into a key character's backstory, with input directly from executive producers Dave Filoni, Simon Kinberg, and Greg Weisman.