Similar to the first print runs of Tales of Xillia, first print copies of Tales of Xillia will earn you two bonus costumes for the returning protagonists of the first game Jude Mathis and Milla Maxwell.
These costumes will be featuring main characters of the last two non-Xillia flagship releases with Jude donning the outfit of Yuri Lowell (Tales of Vesperia) and and Milla wearing the outfit of Asbel Lhant (Tales of Graces). There is no word if these costumes will be available outside the first print runs.
[Source: Tokkurin]
