How about no darkspawn?
Seriously, we got invading demons, the possibilities for creepy eldritch abomination is immense. Why would you want Darkspawn (again)?
We already had an entire game about them, an entire expansion pack about evolved darkspawn and a third of the second game devoted to it (and 1/2 DLC packs too).
You don't play as a Warden and the last blight was 12 years ago. If there were any darkspawn they should appear only on (the hopefully very rare/non-existant) deep roads segments.
Darkspawn move around blighted lands as well. Without spoiling Asunder, the group in that book encounters darkspawn on the surface.
Darkspawn are also a big part of the DA franchise and have a connection to the Fade, Old Gods, and possibly even lyrium the way they hear music. We're probably going to see them during Inquisition and that's a good thing in my book. We need variety in what enemies we encounter.
I'll also point out that DA2 had us fighting a ridiculous amount of demons. It seemed like at least half of the battles were shades + undead or rage demons.