Goodbye Dash Rendar. Goodbye Galen Marek. Goodbye (most of) Rogue Squadron.
All previously released Star Wars video games no longer fit into the franchise's timeline, according to Lucasfilm.
Future Star Wars games will, however, be a part of the new continuity for the most part, along with all the films and The Clone Wars TV series. "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," Lucasfilm President Kathleen Kennedy said. "This future of interconnected storytelling will allow fans to explore this galaxy in deeper ways than ever before."
In an effort to unify storytelling in future products, including the upcoming 2015 movie Episode VII, all Expanded Universe materials from the past are now non-canon, meaning they are out of the continuity of what happened in Star Wars lore. This includes all video games that have come out, in addition to the countless books and comics. However, some of that might not be a surprise, since a lot of the Expanded Universe content has always been very easily deemed non-canon in the past. For example, The Clone Wars TV series mostly invalidated the Xbox/PC game Star Wars: Knight of the Old Republic.
The affected games on Nintendo systems are games such as Star Wars: Shadows of the Empire (Nintendo 64), the Rogue Squadron series on Nintendo 64 and GameCube, and the Star Wars: The Force Unleashed games on Wii and DS.
It is unknown if any of the future Star Wars games will even come to Nintendo systems, though. EA is responsible for publishing the major Star Wars video games and as of now, the last EA release on a Nintendo system was more than a year ago.