Showdown in the Badlands is missing a Nightborne card! As my favorite race, I would love to see one added in the next mini set or expansion.
I would suggest Arcanist Valtrois or perhaps another Faelin variant.
Flavor-wise how would that fit? I don’t recall there being any HS cards specifically tied to any Legion lore as of yet. I might be forgetting something but nothing comes to mind.
Not that I wouldn’t mind a Prince Farondis or something, or even Thalyssra if we’re going for a Nightborne. Valtrois? meh… sorry 
This expansion is happening sometime during the BFA timeline so Nightborne should be around.
Perhaps a more “silly” character like Faelin would fit better in the theme. Surely anyone could show up in Badlands. 