And now, if you excuse me, I'm going to make big assumptions based on practically nothing:
So... is Serah one of the main characters? Looks like it.
And no signs of Snow, I guess the wedding night didn't go very well. Too much of a size difference?
Town is totally empty, that's a very nice way to save time and money. I guess they didn't have much time to rebuild civilization, so that's a nice excuse right there.
Characters are like caricatures, all of them look like (and some are from) that weird NORA group from the first, totally unbelievable "human" beings and most probably annoying.
Girls are sexed up. Now Serah and Lightning are hentai porn characters.
Battle system is very similar to XIII.
There are a ton of reutilised assets, and they probably used many from the scrapped material from XIII and from unreleased DLC. They put these all in a blender, and voilà. No wonder it took so short to make this game when XIII and vXIII took/is taking ages.
Related to the last point: all enemies are reutilised from XIII
00:19 --> Cinematic action? Ugh, Quick Time Events 's in a FF game...
Long narrow corridors are back, with perhaps some ramifications and long wide corridors thrown in.
There you go. Most uselful 14 seconds ever.