New and different trailer, from BBC America.
That shot seven seconds in of a veiny albino, possibly one of the ones in Guantanamo/Misfits boiler suits in other shots, turns slowly to look at the screen really rather like Amy and the Doctor did in the Eleventh Hour shots shown in last year's trailer. I have no idea if this matters. Or why the TARDIS appears Shimmer-style. Or what almost any of this is. I look forward to finding out.