First of all, the site revealed that the new game is a collaboration between Square Enix and Star Ocean developer tri-Ace, and secondly characters from Star Ocean 5: Integrity and Faithlessness have been included in the page.
A few days ago, Square Enix opened a “secret teaser site” for a new mobile game for iOS and Android, and that site has now been updated with some interesting elements.
A new update has been promised for tomorrow, but things are certainly getting interesting.