Lionsgate has announced a slew of release date changes, the most notable of which is that the Saw sequel Spiral is moving back a full year, from May 15, 2020 to May 21, 2021. Now that is a huge bummer, because I was super excited to see that one, especially with Chris Rock and Samuel L. Jackson joining the long-running horror franchise. In fact, the studio is more or less shifting its entire calendar a year, as the Kristen Wiig comedy Barb and Star Go to Vista Del Mar moves from July 31, 2020 to July 16, 2021, and …