Listening to this right now. It's 26 minutes long, an interview with Rainn Wilson. Huge potential spoilers here. You are warned.
http://www.startrek.com/podcasts
http://www.startrek.com/podcasts
Rainn describes his costume, how wonderful it is, and the person who worked on it. An assistant I believe. Rainn says this assistant had sketches on the walls of all kinds of different aliens. Human clothing designs. Klingons. ROMULANS. Doesn't mean they're definitely IN Discovery, but it does mean someone did some designs of their clothing.