I think so too but still I'd love for them to make the Worldbreaker Gun promo. Frost having a building promo is only logical. My suggestion for stonekin would be aggressor/rageflame as they already have the grinder promo. Lost souls should probably have a promo of their beloved LSS. I'd think the Lost Shade would look quite cool as a promo. For bandits it'd have to be Bloodhorn. Corsair would be my other suggestion (as Soulhunter is a copy of Harvester that already got a promo). For twilight Skycatcher would look pretty cool. Don't know which of the other ones is a good choice. Nightshade Plant could be nice.