Straight from the Square Enix Party at the Closed Mega Theatre in Japan, videos have surfaced of the trailers shown to the exclusive attendees playing on two massive screens in the background but instead of trying to attend the event, PSU has them here for your viewing pleasure.
Final Fantasy VII: Crisis Core (PSP)
Final Fantasy VII: Advent Children Complete (Blu-Ray)
Final Fantasy XIII (PS3)
Final Fantasy XIII: Agito (Mobile)
Final Fantasy Versus XIII (PS3)
You can also check out this video for a different angle: Youtube