https://youtu.be/LajUQgWyrCI
Trailer with the new material which includes:
New costumes
New death animations
New map (airship)
New tasks
The new map looks to be huge as some areas you need to use a ladder to access. There are also shortcuts you can take to get around.
After a meeting, you can choose which room (may be limited though) you wish to start in at the beginning of the next round.