Since the royal family of Pegasi lives in the castle of the former Canterlot, we will see the famous stained glass windows with our mane6.
Surely Sunny will be happy to consider the images with his idols)

There is a possibility that among them there will be stained glass windows from the adventures that were after Twilight's coronation.
And, probably, after the adventure of Sunny's friends, stained glass windows will again begin to appear in the castle.
But, that's just a theory)