i was tired of looking at threads about what do u think it is so i did the simplest thing possible i googled jump festa 2007 it was right there it talked about the trailer then said one of his weapons is... drum roll please... soul eater!?! yes uv heard it folks thats right i myself am not suprised. heres the site.
http://butterflyd.animeblogger.net/index.php/2006/12/16/kingdom-hearts-ii-final-mix-jump-festa-2007/
http://butterflyd.animeblogger.net/index.php/2006/12/16/kingdom-hearts-ii-final-mix-jump-festa-2007/