The Way of Water is the follow-up to 2009's Avatar, which remains the highest-grossing movie of all time.
BBC reports Director James Cameron has suggested the sequel needs to become the fourth-biggest film ever just to break even.
In The Way of Water, viewers are transported back to the planet of Pandora, where the existence of the Na'vi people is once again under threat.
In a one-star review, The Telegraph's Robbie Collin suggested watching the film "feels like being waterboarded with turquoise cement".
