If it features the original cast i'm all for it. But I just saw Ramis in a movie called "The last Kiss" last night and he's put on a lot of weight since. That's why i thought a CGI ghostbusters is the way to go.
I think people are familiar enough with what Ramis looks like nowadays. It won't be a shock to see him heavier than he used to be.
I think the bigger issue is the AGE of these actors. They're all so old and gray
now that it would look almost ridiculous to see them still walking around in jumpsuits with proton packs strapped to their backs. Maybe 10 years ago they could have pulled it off, but not now.
I certainly wouldn't mind seeing them in the movie, but only as mentors or something like that.