Turns out, it was indeed a small horse in the box. The one who guessed right is:
Imma guess a tiny pone

Close enough (suspected Derpy):


To be honest, I was planning a different comic page in December, featuring Twinkleshine, with a slightly brooding overall feel. But then I considered that I made you wait a lot, and you deserve something that makes all the wait worth. So there, have a baby horse. We'll get to the brooding drama too, in due time. :3

I think I better not set a time for the next update, because I'll mess it up anyway. I planned the last one to be ready by xmas, and we've only got to it now. But better later than never.