When I first saw this, it was a good movie, but at the end to find out O'Hanlon and Blanc died while making the movie, to see their "In Memorium" credit right before it rolled, really brought down the tone of the movie to me.
It was a good movie until that point, but the sad irony that these two, along with the original Elroy passed away before release, is just sad. It's like watching Poltergeist 3, and if you didn't know Carol Anne died (which was the case, like when I saw this movie), brought down the movie.