Anduin: Rumored to be the grand leader of the Army of Light in Velen's visions. Priest. Prince of house Wrynn. The Prince of Light.
Wrathion: Last in-lore remaining Black Dragon on Azeroth. Red glowy eyes but seemingly a pretty cool dude. The Black Prince.
Both are on Pandaria.
Both (say they) wish the war to end.
Monk/Pandaren theme: Balancing Light and Shadow to achieve inner peace. (See early Monk resource design)
Am I on to something here, or just grasping at straws? Will we see these two join forces?
Edit: Lets not forget a recurring theme in Warcraft's story, either;