Watch Kung Fu Panda 4 (4) HD Full Movie Free on SolarMovie. Watch Kung Fu Panda 4 (4) online free. After Po is tapped to become the Spiritual Leader of the Valley of Peace, he needs to find and train...After Po is tapped to become the Spiritual Leader of the Valley of Peace, he needs to find and train a new Dragon Warrior, while a wicked sorceress plans to re-summon all the master villains whom Po has vanquished to the spirit realm.