It might seem odd considering he brought the Daleks back within three episodes of his tenure and current fate of the Cyber-meh’s but Steven Moffat believes that new monsters are better than the old ones.
“One of the temptations, particularly if it’s a success is to keep repeating your hits, which means you hear it again and again and again…I always say new monsters are better in Doctor Who because you fall in love with monsters when they’re new.”
While there’s no arguing that simply having monsters turn up and replay their greatest hits is detrimental to the show’s creativity you can just as easily argue that it’s not the monsters but the stories they feature in that need to say interesting things about them in order to make the Daleks, Cyberman, et al feel fresh again.
The same can be said for new monsters unless there’s an interesting trait, be it torn from the pages of history or rooted in psychology; without this, that man in a brand new latex suit is going to look very silly.
Still it’s not all over for past foes as Marcus Wilson previously confirmed that two classic monsters would be appearing in the new series.