I'll start with the cancelled moon missions based on the Apollo AMSO add-on for Orbiter.
Flowing the general outline of the available NASA planning documents I did Apollo 18, 19 and 20, complete with terrain, patches and EVAs.
Vallis Schroteri & Apollo 18
The area covered by terrain mesh is about 30x30km. Some surface features were placed to provide interesting destinations for EVAs, based on the actual geology of the region.
The provided scenarios use AMSO to recreate the proposed Apollo 18 mission. They are generic and the orbital trajectories are not optimized regarding fuel or mission duration. Anyhow, I think I've remained within realistic parameters for a late Apollo mission.
Let’s say after Apollo 17 all the hardware as updated and can perform a little bit better. To give that impression, I'm including a CMS repaint with the white Skylab paint scheme.
There’s also a small update to LC39 ground texture that now resembles the actual ground cover in the 1960/70s. I've added some normal maps for the Saturn V rocket and the LEM 's gold foil, for the benefit of those using modern graphic clients.
Get it from http://www.orbithangar.com/searchid.php?ID=6490
Copernicus & Apollo 19
The area covered by terrain mesh is the entire crater, with extra detail around the central peaks. Some surface features were placed to provide interesting destinations for EVAs, based on the actual geology of the region.
Get it from: http://www.orbithangar.com/searchid.php?ID=6536
Surveyor 7 & Apollo 20
Get if from: http://www.orbithangar.com/searchid.php?ID=6549