I love this idea—and have always considered literary egregores nearly as accessible as religious egregores. In fact, probably no better time in history has existed to interact with comic egregores than now due to their mainstream presence in film, etc.
I would love to see a series of lengthy discourses on magick with Lord of the Rings, Marvel, Harry Potter, etc.
S. Ben did pretty great with H.P. Lovecraft in my opinion. But a widely untouched area of discovery exists in human literary fiction.