I don't know if anyone's suggested this yet, but it would be very interesting if we could get an instanced encounter where an entire ward of players must defend their holdings against an invading force. It could be truly massive, with multiple Free Companies participating in a given event. Players have to set up barricades, cannons, and specific units to help guard key assets and push the invaders back. It could be role independent, since players could set up NPC defenders to fulfill key roles like tanking and healing.

What do you guys think?