'The Times Are A Changeling'

In light of the news from EQD, I think you all know what to do...

Change-lings. Change-lings. Change-lings! Change-lings! Change-lings!! CHANGE-LINGS!! CHANGE-LINGS!! CHANGE-LINGS!! CHANGE-LIIIIIINGS!!! CHANGE-LIIIIIINGS!!!

And here I'll just leave some of my own ideas for the title episode in question:

*Through a series of hijinks and accidents, the Mane Six accidentally end up destroying a nearby changeling colony/hive/kingdom. As restitution, Princess Twilight grants the Queen/Head Matriarch and her people temporary residence in Ponyville. Of course, this doesn't go over Too smoothly with resentment and reservations from both sides, and tensions and division between the pony locals and the changeling lodgers quickly form. The key thing here being that both sides are as pugnacious and argumentative as each other.

Things get so bad they end up building a wall dividing the town in two ala East and West Berlin, but things are resolved by the half hour's end, with the ponies and changelings, while they don't have to like, must learn to get along with each other.

*The Mane Six stumble across a last baby changeling and are at odds about what to do: keep him/her and raise them as their own, or take them back to the changelings on a 'road trip'. A kind of nature vs nurture issue, though without necessarily vilifying one group for not wanting the kid around.