Yes, 'Sunset Boulevard' is based on a true story. It draws inspiration from the real - life experiences and fates of some Hollywood figures during that era.
I don't think we can assume it's a horror story. '657 Boulevard based on true story' could cover a wide range of genres. It could be a story of love and relationships that took place in the houses on that boulevard. Maybe it's about the evolution of the neighborhood. There are so many possibilities other than horror.
Yes. The story draws on the experiences of many in Hollywood at that time. It shows how the glamour can fade and how people can become lost in the pursuit of stardom. There were likely many real - life examples of older stars being forgotten that contributed to the creation of this story.
One main element is the decline of a once - famous star. In real Hollywood, there were many stars who faced this fate. Another is the desperation to return to the limelight, which was common among those who had tasted fame. Also, the relationship between the older star and the younger, up - and - coming talent was likely inspired by real - life interactions in the industry.
I'm not sure specifically which '657 Boulevard' story this refers to. It could be a story related to a house at 657 Boulevard. Maybe it's a mystery or a drama that happened there. Without more context, it's hard to say much more.