"A growing light o'er all the realm
Fingers bright on highlands white
In an instance, a blade that smites the night.

But ill winds rise as the great gates yawn
Hope rides to meet what naught can cheat
An old despair astride a new-shod mare..."

There.. logged back in just to see what it was. XD
An obvious reference to Coerthas Central Highlands as "highlands white", and the "great gates yawn", or in other words, open. Meaning the Gates of Judgement will be open at some point. But I think that's a given with the way the story is going. The rest, well I suppose is open to interpretation, or perhaps unknown currently. Well, the very first line I believe is referring to us adventurers or perhaps Hydaelyn.

The final line.. I think of Odin for some reason. But it could be that it is referring to the Ishgardian Holy See (the old guy we see surrounded by Ishgardian Knights).