Not that I have heard, but the only ones who "really" needed to be in on it are VKM, Michaels, Hart and the ref.
I've said this a bunch of times, but the most compelling evidence to me is that they were filming the Bret documentary during that time. VKM would always have full release rights for any footage from the WWF and he chose to let them show the backstage stuff? Not a chance in hell, imo, that he would do that unless he wanted it to work as an angle. Which it did, making him an even more massive heel owner.
Of course.
WWF's ratings skyrocketed after that whole thing.
The documentary sparked enormous interest in the Montreal incident, and Montreal, itself, sparked enormous interest in Vince's product.
Even casual fans who didn't analyze the events
(non-smarks) were intrigued by the blurring of fiction and reality; something pro-wrestling had been missing for a long time up to that point.
And, with some of the angles they would soon run: sex, guns, kidnapping, necrophilia, etc., it was almost necessary to admit that it's all a work.
"Montreal" was an edgy and interesting way to come clean about the business.
It beat the hell out of Vince coming on TV and saying, "Oh, by the way...you know the last fourteen years? I LIED!"