Just wondered if the exploding red telephone box in the trailer is actually the TARDIS, following on directly from the end of TEOT.

If the TARDIS is crashing and needs to reset it's appearance (we know there are changes to both interior and exterior) perhaps it goes through a few modifications (red phone box) before settling back on the Police Box again.

Also in the trailer there looks like a quick scene of a room which looks like it's underneath the console room and there are explosions.

Any thoughts?