Finally rented & watched The Great Wall.

Positives:
+ Visually stunning, especially in the vibrancy of colours (Zack Snyder could learn from this).
+ The "white saviour" role thing wasn't nearly as bad as I thought it would be.

Negatives:
- Story ranges between being average to absurd.
- Visual effects and action scenes are underwhelming.

Overall: "Meh."