I think I said this is the main thread a few months back, but Ghostbusters is in a unique position. It's a coming-of-age touchstone for mid- to late-Gen X (see its inclusion in Stranger Things). If there is a movie and character that shaped my generation, it's this and Peter Venkman. But then the somewhat more juvenile sequel and especially the long-running cartoon that followed hooked in a lot of Millennials, who made it their own. I'm hard pressed to think of another IP with that much cross-generational reach not owned by the Mouse.