seeing potential spoilers ruined by early toy lines. Buckle up, for we have yet another piece pertaining to such things again.
Assuming you actually watch the show, in season 5 we learned that at some point or another, the two love horses did what any new married couple does and now have a baby foal on the way. What we didn't know was who that foal is going to be. Thanks to the German subsection of Hasbro [Archive], we have found out the name.
"The baby Princess Flurry Heart is the small offspring of Princess Cadance and Prince Shining Armor. She can speak several sentences, her horn flashes, and she reacts to sound (noises) and touch. Furthermore, she can be fed via her baby bottle."
As yet, there are no pictures of what she might look like. Though we do have our speculations.