Bill Murray is down for Ghostbusters 2020
https://www.indiewire.com/2019/05/bill-murray-ghostbusters-sons-college-cannes-2019-1202141338/
"I was in that movie just because they asked me, and I knew if I said no, I was saying I didn’t support that movie,” he said. “I felt like, OK, I’m going to support them because I support them as people. So I did that one and I would do this next one."
"The relationship you have with those people as collaborators is not necessarily the relationship I have with Sony,” he said. “For years, they said, ‘We can’t make another “Ghostbusters” because Bill Murray won’t change the deal he made in 1984.’ Well, no, I never did. And you know what? They made the movie. You’re the new guys, I’m the old guy. It was good enough for the other people so it’s going to have to be good enough for you."