Siliconera’s found a trademark for Tales of Xillia in Europe’s trademark database.
Tales of Xillia was released for PlayStation 3 last year in Japan. The game feature two lead characters, each created by different character designers. Namco’s always said that it plans to bring more Tales games to the West, so it could be that this trademark could point to a Western release.
Another title in the series, Tales of Graces f, was recently released in North America, although there is currently no solid date for release.