Even though the shiny new Daleks destroyed their predecessors on Doctor Who, we haven't seen the last of the classic Daleks, promises showrunner Steven Moffat.
The new Doctor Who Brilliant Book quotes Moffat as saying:
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.