The available Amazon Prime add-on subscription options continue to grow with the addition of three new networks. Comic-Con HQ has been added with original shows covering the latest headlines and stories surround pop culture, as well as a nice selection of cult films like American Psycho, Spinal Tap, and much more. Comic-Con HQ is available for $5 per month. The next new network added is Xterra TV, an add-on subscription dedicated to endurance sports and adventures. It offers original programming that covers their annual events like the Xterra USA Championship and Xterra Adventures. A subscription to Xterra TV will run you just $2.99 per month. Lastly is the addition of the Powerslam Wrestling Network for $5.99 per month. It offers professional and independent wrestling matches like Highspots Wrestling and Women Superstars Uncensored. All three of these new add-on subscriptions come with a 7-day free trial and a very easy cancellation procedure if you decide the subscription is not worth keeping.