I am fairly new to this MMO (and know little or nothing about past Final Fantasy games).

That being said, I always considered the Warrior in the scenes to be a "stand in" for my own character. The HW trailer for example, incorporates as flashback everything that happens to me at the end of 2.x and beginning of 3.0. That final cut-scene would thus be a bit, um, deceptive as far as what really is going to happen.