Camelot is the Arthurian-themed Crazier Eights set (the Second Edition). An older version of the Second Edition can be found here. A prototype of all the cards can be found below. The final version could be somewhat different, but will be very similar to what is shown here.
To see the current rules for Crazier Eights: Camelot, go here.
Crazier Eights: Camelot will have a Kickstarter campaign in February or March 2017. To keep up with any relevant Crazier Eights news and updates, you should join the Newsletter.
Corbenic Castle is a promo card: