(RNS) — Seven years since first airing, the mega-hit biographical Jesus drama “The Chosen” is a full-fledged franchise. The evidence? An annual multi-day convention (Chosen Con), merch (hoodies, coloring books, jewelry), the fandom (over 308 million viewers) and now, a spinoff show (“Joseph of Egypt,” expected in 2027), even as the original series is about to go into its sixth season. Available on its app as well as streaming, “The Chosen” is a Bible show designed to be viewed on demand. Created by evangelical Christians, it’s also upfront about its agenda to point viewers to Christ.…