A new Warhammer Online Producer's Letter looks at plans for the upcoming version 1.31 patch for Warhammer Online as well as the version 1.32 patch to follow (thanks Massively). The version 1.31 patch is called "City Invasion," and it will mark the beginning of a series of changes to end-game city sieges:

One of the biggest enhancements going into this patch is the new approach we have made with our end-game city siege experience. After months of feedback from you, the players, and our own personal experience playing the game, we realized we needed to step back and reevaluate the city siege mechanic from beginning to end. Specifically, how can we make the city siege experience something players will strive for? How can we reinforce RvR in the endgame and not RvE?

Now, before diving too deep into the changes we made, I want everyone to know this is really just step one. We simplified the flow, removed barriers, and most importantly refocused the gameplay on killing your opponents. We set up the city end-game experience so we could easily expand it down the road to make them even more epic.