One of my top wishes is for a festival lot type that we could have 3 or 4 festivals saved that rotate. Renaissance faire, wine fest, food fest, carnivals, etc.
I would love a ren faire in game, I agree there would need to be some way to establish a dress code since that is part of the fun.
I never considered the idea of having a whole world that could be viewed as an opportunity for time travel or like a theme park, I really like that idea too.
Either way this is a pack I would purchase at launch. I too would want to see things like unique foods, archery, fencing, and lute playing.
Additionally I think a pack like this would be a great opportunity for dragons,royalty cas, jewelry making, blacksmithing, and maybe even nectar making.