Think it’s all about mitigating risks. Spending X amount on a show, it’s easier to pitch as a known name then as an original franchise. Unless you have another name to bank on, say with James Cameron and Avatar.
That’s the fun thing about franchises like Watchmen to Star Wars. Born out of a failure to secure existing franchises, in many ways, eclipsed their inspirations. Stranger Things isn’t exactly the same because I don’t think they wanted to make an It show. Whatever close enough to the point.
Resident Evil, tho. I don’t know what the appeal is to general audiences. Somehow two movies or TV shows released months apart, completely unrelated? Neither based on existing games or those odd RE superhero movies?