According to the official LOTRO blog, "When we made the decision to delay the release of the Rider’s of Rohan expansion, we also made it clear that we would still honor our commitment to release the instances this year. Because of the delay in shipping Rohan, development time for the year was obviously reduced. This left us two options; either delay the entire instance cluster until 2013, or release those instances we felt could be completed with the highest degree of polish in December and delay the others until they are ready (currently expected to be February). We’ve chosen to honor our commitment as best we can with the limited time remaining in 2012 while still insuring the highest quality possible."
Update 9 will go live on the Bullroarer server. For more information on the Riders of Rohan delay, visit the blog .