There will be a new "Mission Theater" arena where missions are generated and fly every hour, on the hour. Really haven't heard detailed info about this proposal yet, but alot of people have expressed interest. I expect it to draw more people away from the CT than it does the Main, but we will see...
Also, users will be able to customize planeskins. Again, not much detailed info has been made available yet.
Like Karnak, I'm hoping for a serious effort to expand the Japanese planeset in v1.11.