Where/When/Who/How should a hypothetical Downton reboot happen?

Let's imagine we are 20 years in the future. A director/producer/writer team come to you, the most ardent Downton Abbey fan girl/boy. They tell you they are relaunching Downton Abbey and they want you, the most die hard Downton fan, to tell them where they should pick up from. Right where the third movie left off? Fast forward into the life of Master George inheriting the title and estate in the midst of WW2? Fast forward to the heir of Master George reigning from the Abbey during the turmoil of the 60's? Or fast forward to modern Britain and the present-day Earl?

Or even more wild, do you suggest not a relaunch, but a spin off!? Thomas's life as the "dresser/assistant" to a famous American actor? Whatever happened to poor old Ethel? What about the life of her son? Do we focus on the American playboy lifestyle of Uncle Harold during the Gilded Age in America?

I would love to read Downton fans' fantasies about this!