More info gleamed from The Brilliant Book, re: The Daleks. Steven Moffat has said...


The fact is, we’re not going to lose the old Daleks. We’re keeping them. They’re coming back. We’ll just use them all at once, and have different ranks.
All I’ve done is give the Daleks an officer class.

Steven Moffat has also revealed.

Told my son the title of ep 1 of the next run of Dr Who. A pause. "I think we can do better, Daddy." Then: "We need clever. Not cheesy."