VIDEO : 'Avengers 4' Could Shuri Be The Key To Victory?

While the most popular Avengers 4 fan theories suggest that Ant-Man learns how to travel through time or the Quantum Realm, or Doctor Strange messing around with the Time Stone, a new theory hints at Black Panther's younger sister Shuri being the key to victory for Earth's mightiest heroes.A Reddit user by the name of ...