Lucasfilm has put out an announcement on StarWars.com that explicitly states what everybody already knew but a few weirdos kept denying: the Star Wars Expanded Universe is dead, is non-canon and will have no bearing at all on the new films.
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.
Which is very good, as all that Admiral Thrawn/Mara Jade stuff was junk and I can't believe grown adults keep clinging to these bad stories. The good news is they can continue clinging to those bad stories as the old books will remain in print under the "LEGENDS" banner. I guess it's sort of Star Wars What If...? (Specifically "What if after Return of the Jedi a lot of dumb stuff happened and it was dismally written by a guy with poor skills?")
Here's where it gets weird: they will still use some Expanded Universe concepts in non-movie material.
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.
This makes sense - Lucasfilm owns all these characters, planets and concepts so why just throw them out. But fans will get tripped up by this - they'll see something show up in Star Wars Rebels that they recognize from an old book and argue that the old book is still in continuity. Fandom problems!
The new canon begins soon:
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.
I guess this means Expanded Universe stuff set in/before the Prequels is still canon? Does this new canon only apply post-Jedi? What do you think?