New songs' BGAs should be included with the update but won't be downloaded off the server.
I've talked with one of the arcade manager today and he said they're having some technicians coming in next week with the content DVD and external DVD drive to upload all the new contents onto the machines.
"Even though 10 new missions won't make it in this update, they will be added in future updates or added with next year's Network Battle (or Network Head-to-head if you want a more literal translation)"
and the Google translation:
"4, 10 Although the task is part of the revision is not to become content revision
But can update or after the Versus network next year, appeared ..."
kingtronic is the official Technika representative in Taiwan by the way
That sounds pretty hype, anyhow -- but it depends on how it's executed.
If a player is allowed to have a streak, for example, I think the handful of people who've played Trilogy here would agree that having the challenger pick the song would be best...