Good King I have seen your fate
Your kingdom that you will dominate
Your Mighty host turned into rubble
The King and the Angel will make a beautiful couple
beware the Surrender for your blood
Will taste the mud
The Crossroads will lead to Deception
Even after a warm reception
The North’s stand turned to bronze
Remember the enemy from eons
Now ironically the fourth line is talking about King ULTHOR Young and Joanna Forrester not King Aeyron and Joanna.
The fifth line is referencing Trystane Archer's death at the hands of Ulthor, who murdered him after he surrender to him.
The Seventh line references Lord Harold Strong's death after he were welcomed to The Crossroads Castle, the betrayal that resulted in the near decimation of his army.
The ninth line can be seen as two different things. Either the Bronzemen invasion of The North and subsequent capture of WinterFort OR you could read into it and suggest the North's Stand being Lord Darion Bolton who is the lord of Last Stand, situated in the North. He betrayed Gerold Forrester, invading WinterFort with the Bronzemen though it appeared to everyone else that he rescued the castle from the Bronzemen.
The last scene is an ominous warning and it references something that doesn't seem to have happened in the first book.