When it rains, its pours. Not sure where these pictures come from just yet, it was found by Lethallin via imgur, but we’re guessing another preview found in the puzzle games. From what we can tell these are images from the upcoming episode MMMystery on the Friendship Express, but are not 100% sure, it could be Dragon Quest (or a mixture of both). Picture gallery after the page break. Imgur gallery found here.
Update: Its been generally determined that the screenshots are more than just MMMYstery of the Friendship Express, they include that episode and the few others that are coming up.