Well the "Doctor Who" crew has been filming in New York City this week and it seems it's this is not only Amy's last episode (Rory's too) but it involves the Weeping Angels! So to me it seems very obvious what will happen.
How can you NOT have the most famous "STATUE" (I know it's not really a statue but a shell) NOT be a Weeping Angel? How? You can't that's how! So here is my speculative trailer for Doctor Who - Angels Of Liberty!
(Ed; many thanks go out to Rick Kelvington for the excellent parody).