Don't worry, you won't find any master of unlocking–level voice work in this Final Fantasy XIII trailer, as all the character actors totally bring their respective A-games. It's the same trailer Square Enix released for TGS, although now that it's in English, you can actually understand what's going on.
There's combat, engagements and some totally badass summons to see, so waste no time hitting that play button. Still reading -- what are you waiting for? Hop to it!