Whether they aired as a Movie-of-the-Week, popped up on bootleg DVDs or on YouTube, or simply vanished into the abyss of forgotten pop culture, there have been A LOT of failed attempts at formulating a hit television series. Some of the biggest stars appeared in these little-known movies, some pre-stardom and some nearing the end of their careers. And some of these films are actually surprisingly great and would have made damn good TV shows. But others are more WTFWTT??? NOTES: - There are discrepancies on whether or not some of these were pilots or just TV movies, especially with…