Lest anyone confuse the issue (reported on first by Lightsaber Rattling and, today, The Hollywood Reporter) Star Wars Insider short stories are canon from the current story, ‘Blade Squadron’ on. The first part of the story, in Insider #149, came out shortly before the official announcement regarding the Expanded Universe.
Yeah, but think of how funny it would be if The Tenebrous Way was canon and Darth Plagueis wasn’t.