My view of canon has always been that it must be a two way street. What I mean by that is that for derivative material to be canon, not only must it be consistent and respectful of the source material, said source material must in subsequent instalments (sequels, prequels, new TV seasons etc. etc.) must be consider the aforementioned derivative works to exist within the same continuity.
A good example of this is the canon Babylon 5 novels (so called because most of the initial run of licensed tie-in novels aren't considered canon.) Not only to they fit perfectly within the continuity of the show, but the show itself was beholden to the version of events depicted in those books and in the case of 'City of Sorrows', the events of the book (Sakai's off screen disappearance) is directly referenced, if only in passing.
An even better example is the Mass Effect & Dragon Age books. Not only are the novels considered canon, but events from the books are recounted in subsequent games and they even have characters originally created for the novels, later appearing in-game.
The bulk of the Star Wars EU was frankly the continuity equivalent of the Tower of Babel. There's no way anyone should expect any new movie or TV show to be beholden to all of that noise. Half of which was only "consistent" to the other half thank to an awful lot of retcons, rationalisations and frantic hand waving by wiki editors.
A good example of this is the canon Babylon 5 novels (so called because most of the initial run of licensed tie-in novels aren't considered canon.) Not only to they fit perfectly within the continuity of the show, but the show itself was beholden to the version of events depicted in those books and in the case of 'City of Sorrows', the events of the book (Sakai's off screen disappearance) is directly referenced, if only in passing.
An even better example is the Mass Effect & Dragon Age books. Not only are the novels considered canon, but events from the books are recounted in subsequent games and they even have characters originally created for the novels, later appearing in-game.
The bulk of the Star Wars EU was frankly the continuity equivalent of the Tower of Babel. There's no way anyone should expect any new movie or TV show to be beholden to all of that noise. Half of which was only "consistent" to the other half thank to an awful lot of retcons, rationalisations and frantic hand waving by wiki editors.