Complex sentence: Virtually no information about Sword of Legendia has been released to the public (as of February 16h, 2007), but it can be assumed that it is a sequel or spinoff to 2005's Tales of Legendia, part of Namco Bandai's Tales series.
Split into simpler sentences: Virtually no information about Sword of Legendia has been released to the public (as of February 16h, 2007). It can be assumed that it is a sequel or spinoff to 2005's Tales of Legendia, part of Namco Bandai's Tales series.