I think this is really solid and makes a lot of sense for a fallen raid. Everything I have read says it will probably be fallen-themed. After reading those articles, I immediately thought about house of kings. It just makes sense. Skolas wishes he was Kell of Kells, get mopped in a few story missions and sent to prison. Then the true Kell of Kells rises after Skolas' defeat and gets a full DLC with a raid to defeat him. I wouldn't be surprised at all to see it play out in some way close to this.