So, Nintnedo just dropped the Zelda Bomb at The Game Awards on Friday.
In it, Miyamoto and Aonuma were showing off actual gameplay of the game (Which is looking to be amazing, BTW, the world is HUGE).
As they're playing, Miyamoto asks Aonuma if the game is REALLY coming out next year, given its complexity. Aonuma confirms this, and then goes on to ask Miyamoto about Star Fox.
Miyamoto confirms that Star Fox is progressing well, and will release BEFORE Zelda, which is obviously Nintendo's big Holiday 2015 title. He also goes on to say it will be coming AFTER Majora's Mask 3D.
As of yet, we don't really have a time frame for Majora's Mask, though given how long they've been teasing it, it is probably coming early 2015, summer at the latest.
This means that we will probably be seeing Star Fox in Summer 2015. Of course, that's speculation, but hey, we have a release window, if not a completely vague one.