The Dartmoor Garden Show showed how much the architecture and geography of a level can be changed, as in not just new props added but whole portions removed or reworked (the fontain is the biggest one, the Japanese garden with its elevations and mini lake is another one).
More interestingly Envy showed that maps could be heavily retextured (the walls, the floors…) in addition to props (you can compare Yate’s room in the Villa to the normal map, every furnitures have been swapped for a new modern one).
Which unless I missed something was a first, and I’m tempted to say might have been a prototype (but I have to stress out, this is just a guess of mine).
Finally, to quote from the latest Insider. Now I know we should not read too much from it and overhype, but I am intrigued.