Finally got my greedy lil' hands on an actual import copy of Final Fantasy VII: Advent Children Complete. With said Blu-ray disc in hand, Square Enix was courteous enough to include HD trailers for the PSP portion of the Fabula Nova Crystallis (Latin for The New Tale of the Crystal) FFXIII collection entitled, Final Fantasy Agito XIII.
Thanks to the popularity of the mobile phone game Before Crisis: Final Fantasy VII, Square initally began work on Agito on the same platform until deciding to move on to the Sony Playstation Portable platform. Mobile phone FF fanatics... this one's for you.
Final Fantasy Agito XIII Japanese Trailer