screenrant.com - BY BEN GIBBONS -Sam and Dean could be gearing up for a big return to Supernatural for season 16, but what would the story be about after the boys saved the universe?
screenrant.com -BY RHYS MCGINLEY - Some Supernatural storylines were dropped and left untouched for up to a decade while others, were teased, set up, and then never made a return.
screenrant.com -BY RHYS MCGINLEY - Some Supernatural storylines were cut off before they could realize their potential, while others dragged on a bit too long to be great.