Once again, it looks like Soraya Saga, who is married to Xenoblade Chronicles creator Tetsuya Takahashi, has tipped us off to some incoming Xenoblade Chronicles X info. Soraya always retweets Nintendo Direct information when some of her husband's work is going to be shown.
That's exactly what she did with today's Nintendo Direct info, so it certainly seems like we'll be getting a look at something Takahashi is working on. This could pertain to Xenoblade Chronicles X or the New 3DS port of Xenoblade Chronicles.
Source:
http://www.gonintendo.com/s/240942-monolith-soft-info-looking-likely-for-tomorrow-s-nintendo-direct
Link to her twitter:
https://twitter.com/sorayasaga/with_replies