Re: concept art and set photos!
Between Worf having compatible ribosomes with Romulans and the Klingons in the new film having pointy ears: I wonder if the case could be made they all share the same genetic heritage? Perhaps the Preservers were involved seeding one planet with inhabitants from the other?
"I tell you what you all need, you need to take a thirteenth step, down off your high horse." - Hank Hill, King of the Hill