Matthew
I was just wondering. Do you disagree with the original Ghostbusters returning due to their age because they will no longer look the part or is it because you feel it has something to do with their acting ability? As I have said in a previous post, I see absolutely nothing wrong with the four original actors returning. It is a Comedy after all and I personally feel that their age would only add to the humor. Also, what is the retirement age in America? Wouldn't they still be in the business if it were real life?
You have a point, there are firefighters, police officers, and emergency workers who are as old and older than Ramis, Murray, Aykroyd, and Hudson (although you usually don't see a whole squad of them!).
My saying it should probably be new actors is only to increase Ghostbusters' appeal to a new generation. The reason the first movie was so popular originally was because Murray and Aykroyd were hot young comedians at the time. Why not bring in some hot young comedians to increase the box office and make the kids show up at the theatres? Most young people today aren't fans of Murray and Aykroyd.
Back when GB3 was looking like it would happen soon I heard rumors about Chris Farley, Chris Rock, and others maybe being involved. I'm sure the reason was to bring in more than just Ghostbusters fans like us, the movie studio wants to appeal to non-GB fans too.
They would just have to pick the right actors/comedians. They have to approach it the right way, or the movie wouldn't work. I think it could be done well.