When I hear the word canon I reach for my revolver.
--
+++++(But then again, didn't GW fans everywhere just accept "oh and by the way, these last few centuries where we've set all these campaigns? Astronomican totally failing. We forgot to mention that.")+++++
It is darwininan evolution - mutations occur constantly - ideas that prove popular survive and spread through the memespace, while others wither and die.
So long as it is with the understanding that the next time an idea may be mutilated, melted down for parts, discarded if it gets in the way or picked up and run with putting out any old **** is fine.
As an excuse to tell people they are doing it wrong and to suppress ideas and enjoyment, canon is hateful and must be destroyed.
--
All in all, if it comes down to someting not existing and someone telling me or anyone else that I can't play/write/draw/paint X because... I'd rather it didn't exist, kthnx.

.
...hehe...