Kung Fu Panda: The Rise of Shen

We all know how Shen was banished, and how he got defeated...But who was Shen exactly? What did he do after his banishment? How did he get acces to his army, and weaponry? Who did he meet? After his banishment, Shen had to walk a dark, blood-soaked path on his way to happiness. But everyone deserves to have his or her's story told. And now, its the hour of Shen the Peacock...