The current info in the Mir is that they are opening a campus for (at least some of) the bachurim in Switzerland.
The rumor is that the owners of the Arosa Hotel have rented/given it to the Mir until Pesach.
(based on emails that they sent out + conversations with some of the magidei shiur)
Unknown to me at this time, if this is just for European bachurim, or all chutznekim.