A new movie called "Bloodline" purports itself to be a documentary that claims to have found evidence that Jesus and Mary Magdalene were married and their "bloodline" has been kept secret by the Catholic Church and a group called the "Priory of Sion." (NB's Scott Whitlock and Mark Finkelstein have written on this as well.)
But the truth is that the film's premise is based on a complete fabrication. The "Priory of Sion" was founded in 1950's France as a hoax by a known trickster. Yet the group's fictions continue to be forwarded by those despise Christianity and seek to degrade the Church. The Priory and its related claims have been debunked over and over and over and over and over and over again.