Spoiler Alert, click show to read:
Edmure is being cast, and the Blackfish along with additions to the Tyrell family like the Queen of Thorns and they are recasting Berric Dondarrion.
Also Shireen has been cast.
http://www.digitalspy.ie/ustv/s151/g...baratheon.html
As for Ramsay ( my personal favourite in terms of how curious I am )
Here are some of the contenders from what I have heard.
Domhnall Gleeson
Robert Sheehan
And although we would all like to see Cillian Murphy play him, it just ain't gonna happen, haha.