Finally have seen a video of this trailer in good quality. At the moment, I'm just going to call it FFXI-2. So many similarities, I wonder if using FFXI materials is really just lazy, or if it's intended.
Case in points:
The Graphic itself shows the five races near the end, of which you see several in the video itself (is that a tail-less galka lol.)
Even in the screenshot sections here: http://na.finalfantasyxiv.com/ lots of similarities. Similar armor styles in that opening pic, redmage and warrior stand out. (Don't bother pointing out how its the jobs style, I know. The redmage elf body though looks like the Relic Set from 11, not the classic redmage.)
Also, that last screen with the Mithra in the blue protective looking sphere, that's the black magic casting animation for them from 11. I could go on but you see my point, the first view of this to me is a shiny FF11.
Looks nice but /playtime says I've put over 1000 days into 11 itself and unless there's some kind of serious bonus for going over or a transfer option, I don't know how many people would even bother. (those that play 11 I mean) Then again, that's just my humble opinion, time and more information down the road will tell us more.