So far Wow has let us play as humans as well as a plethora of fantasy creatures. They have even given us mechagnome androids. Which are cute. But what I propose is the opportunity to play as sentient robots. Character creation would involve customization of the robot’s body-parts. Instead of wearing clothing / armor the robots can gain body parts to increase stats.
As I said, the mechsgnomes are cute and a start. But I envision Terminator like all machine Warbots, equipped with light-sabers, ray-guns. Big humanoid bots that can look menacing, or like C3PO. Maybe the C3POs can be heal-bots. Big TankBots that fire lazers from their red eyes, and rockets from their arms, They can have force-fields.
We already have some good models and skins plus futuristic weapons in Wow content /resources. Instead of animal mounts we could have anti-gravity and rocket mounts. Etc.
We could role-play our robots; And say things like: “that does not compute!” “Danger danger Will Robinson!” Relax Humans Skynet is your friend!"
“Resistance is futile, you will be assimilated” Oh wait Borg are androids. Ahem, Well you get the picture.