Trivia: When Ann and Eddie are on their date, Ann reminds Eddie of his firing from the Daily Globe. In the Spider-Man comics, Eddie Brock was a reporter for the Daily Globe, a rival newspaper of the Daily Bugle. In the comics, a string of murders were being carried out by a serial killer named the Sin-Eater. Eddie interviewed a man who claimed to be the Sin-Eater but Spider-Man captured the real one and the man that Eddie interviewed was found out to be a compulsive confessor. This incident caused Eddie to get fired from the Daily Globe and sometime after becoming Venom, moves to San Francisco after agreeing with Spider-Man that they will not bother each other on the condition that Eddie no longer commits any more crimes.
Trivia: When Eddie walks into Mrs. Chen's store, Eddie asks Venom what he would like to eat. Venom responds that he wants tater tots and chocolate. In Venom: The Hunger, it's discovered that the symbiotes need a chemical called phenethylamine to survive. This chemical can be found in both brains and in chocolate.
Trivia: There is a post-credit scene that shows Cletus Kasady, aka Carnage, in San Quentin prison.
Trivia: The law firm Anne Weying works for is named Michelinie and McFarlane after Venom's creators, David Michelinie and Todd McFarlane.
Trivia: At the start the surviving astronaut is called Jameson. Per the comics and previous Spider-Man films he's Jonah Jameson's son.
Trivia: Tom Hardy is known for previously portraying another comic book character as Bane in The Dark Knight Rises. In the comics, Bane enhances his strength with a drug coincidentally called Venom.
Trivia: During the fight with the SWAT team a Wilhelm scream can be heard.
Trivia: Tom Hardy has said that singer James Brown influenced Venom's voice.
Trivia: Marvel producers confirmed that Venom is not set in the Marvel Cinematic Universe, it is in its own universe. It is Sony property and is the first film in the Sony Marvel Universe, which is adjunct to the MCU.
Answer: Venom was using Eddie, much like Riot, to invade Earth. Venom was damaging Eddie's body until he grew to like him, which is why he said he could fix it while Dan was telling Eddie all of this.