You know, I always thought about the fact there is a chance that we may see humans and possibly other races in the near future like the last shows. Theory: Humans once lived in Equestria and formed a special following that enforced balance between day and night. This gained followers from other races like elves, dwarves, orcs, goblins etc. When Celestia sent her sister to the moon, the humans rebelled against her seeing it as an act of a power grab. But Celestia was too much for them and exiled the entire human race among the rest of the races who were supported Luna out of Equestria. Leaving a large number of races resentful of her decision for a thousand years. Still calculating and planning to return to their homeland when Luna returns. Just a thought.