Is there a connection between the monster from IT and Gozer the Gozerian from Ghostbusters (1984)? Both are inter-dimensional, shape-shifting monsters who take the shape of whatever their prey thinks of.
But is this merely a coincidental similarity between the two stories or are they connected somehow? There are obvious differences sure. But part of me wonders if they were both inspired by the same legend or mythology or lore. If the only similarity were shape-shifting I probably wouldn't have even made the connection, but they also are both from another dimension and they both take the form of whatever is in the mind of their victims. That makes me wonder if there is a deeper connection.
(Also might be significant that Ghostbusters and the novel for IT came out around the same time; 1984 and 1985).