Yes, the Daleks are back! What that means with the Zygons also being featured is anyone’s guess. But if there is a new war brewing, that will no doubt be spectacular. The official teaser trailer was shown at the San Diego Comic Convention 2013, and show runner Steven Moffat asked attendees with recording devices to not post it to the Internet. Hopefully by late September, it will begin airing on television in the UK and North America to build up interest for the broadcast. In what has been described by text, the tension is high as Daleks are seen exploding and all three Doctors are interacting with one another.
During the panel Moffat explained how much planning went into this production. In a report by io9.com, he responded to a fan that he received direction right from the very top. He said, “I’ve still got the memo from [original producer] Verity Lambert outlining what she wanted for the 50th, so I’ve gone with that … [There were] things we have been setting up for a very long while that we’ll be resolving in the 50th and Matt’s final episode. But the most exciting idea is obviously the one we’ve just come up with.”
Source: io9.com