At first I wanted to design a Discoshy offspring, but when adding colours it started looking too much like Shy herself, so I just changed the hairstyle and turned it into Shy as bride of Discord instead.
 
Some hundreds of years into the future
 
And while Princess Twilight initially regarded the slow transformation with suspicion, shes now chill, cause she noticed that at heart, Fluttershys remained the same good-hearted being shes always been. Better yet, shes even influenced her husband. The two tend to disappear into the realms of chaos between worlds ever so often, playing at the twinkle of eternity.
 
To me, her right leg - remaining its original colour (probably still with cutie mark too) - signifies that she isnt 100% corrupted.