Late last week Sigourney Weaver let slip some pretty huge news that Bull Murray may return as a ghost in the long-gestured Ghostbusters 3. During a recent junket for Avatar in London, Weaver was confronted about her earlier statement, which clears up a few things. So will Murray be a ghost? “I don’t know,” she told MTV. “He could come back as a sort of Slimer character.” She continues, “I haven’t read the script…I guess my little son Oscar who was kidnapped is a Ghostbuster, which makes me very proud.” You can watch the full interview below.