Well, I couldn't stay away from this, could I? I for one am quite happy that Disney cut the ties, finally. That means the Beeb are free to find a new funding partner going forward.
As for Davies, so far he's only confirmed for that holiday special, and honestly I hope he signs off after that. His work has been uneven since he returned (with super high peaks, but cavernous troughs), and it's probably time for new blood.
My suggested opening scene for that next special would be:
We revisit the last seconds of 15's regeneration, standing in the open doorway of the TARDIS as he vanishes in an amber shimmer of light, and is replaced by a familiar blonde WOMAN IN WHITE.
WOMAN IN WHITE: (looks smiling into camera) Oh, hello!
The camera angle changes to a WIDE EXT shot of the TARDIS in space, showing us a figure standing in thin air, facing the WOMAN IN WHITE.
FUGITIVE DOCTOR: Huh. I guess you must be the last guy's Watcher? Off you pop, I have work to do. A whole lotta running.
The WOMAN IN WHITE dematerialises, never to be seen again. Cue SERIES INTRO.