Long after the modern era. In a unknown era. After nuke wars an the start of a new age of rebuilding.
A way the world could go. 
People taking in old ideas an implies them to their culture. Like in 1000 years from now. People think mandalorians was a real Empire. Or the Krogen or elite from halo an mass effect was real aliens that visited. Disney was a old God. An had a empire an castles an parks for the rich. There are zones with anomalies an a giant gorilla somewhere named Kong. Crazy people..