I were thinking about Nightshade ever appearing in the current generation of the show. Not that this design would ever be considered, but I worked around on how I imagine he would look like as a G4 character, complete with a background and being a Pegasus instead of an Earth Pony. Not sure if Las Pegasus is how the part of Equestria is called, but that is where I would like him to emerge from if he ever would be brought back from G1. As for him serving some dark cloud demon, not sure if that would be back as well.