I wanted to love this so much but just couldn't. There are very few of the main cast actually being spoken to and a huge chunk of the documentary is just videos from conventions or interviews with people who had absolutely nothing to do with the movie.
Yes unfortunately some of the cast are no longer with us and that is very sad as obviously there is no way to interview them or get their input.
Clearly most of the people who are however just simply didn't want to be involved in this which is unfortunate also.
You may find out some information you didn't previously know but it will be very little.
I'd recommend just watching the movie and pretend that this isn't even a thing.
Yes unfortunately some of the cast are no longer with us and that is very sad as obviously there is no way to interview them or get their input.
Clearly most of the people who are however just simply didn't want to be involved in this which is unfortunate also.
You may find out some information you didn't previously know but it will be very little.
I'd recommend just watching the movie and pretend that this isn't even a thing.