A new teaser site popped up today at sukimusu.jp.
This may not immediately seem game related, but some teaser site sleuths did some sleuthing and sleuthed that the site's domain is registered with 8-4, a Tokyo-based localization company (8-4 is also responsible for the Japanese gaming-focused 8-4 Play podcast.)
The teaser page is in Japanese, so this may be related to an English to Japanese localization. While 8-4 is mostly know for Japanese to English localizations, it has also done English to Japanese work on such games as Shadows of the Damned and Epic Mickey.
We should find out what Sukimusu is on Monday.