Parents need to know that Thor: Love and Thunder is the sequel to 2017's Thor: Ragnarok and the fourth Thor film in the Marvel Cinematic Universe. After helping the Avengers defeat Thanos -- restoring the lives of the people who got "snapped" -- Thor (Chris Hemsworth) has retired from the avenging game, joining the Guardians of the Galaxy on their intergalactic adventures while he searches for inner peace. But his carefree retirement is interrupted by a new threat with a thirst for celestial blood: Gorr the God Killer (Christian Bale). Enlisting the help of friends Valkyrie (Tessa Thompson) and Korg (Taika Waititi) and ex-girlfriend Jane Foster (Natalie Portman) -- who now holds the power to wield the hammer Mjolnir -- Thor will set out to put a stop to Gorr's bloodshed before it's too late. With Waititi back in the director's seat, expect this film to be more comical and lighthearted than the early Thor films. That said, there will still be plenty of comic-book style violence, and romance promises to be central to the plot.