I was just rereading some chapters and realized a second reference to sasuke to a hawk. When madara was on his statue he said something about sasuke either becoming a snake or a hawk. Obviously snake makes a referance to oro but what about hawk.
So the second place i am talking about was actually before this. When sasuke stood up against oro he referred to himself as a hawk. http://manga.bleachexile.com/naruto/344/14/
so whats up with these hawk references.