Development
By 1997, David S. Goyer had written a script for a film featuring the Marvel Comics character Venom, which was to be produced by New Line Cinema. Dolph Lundgren was in talks to star in the film, which would feature the character Carnage as the main antagonist. The project did not move forward, and the film rights to the character moved to Sony Pictures along with those for the character Spider-Man, of whom Venom is an antagonist in the comics. Eddie Brock, the alter-ego of Venom, would appear in Sony's Spider-Man 3 (2007), with Topher Grace in the role. Grace was intended to only briefly appear as Eddie, but became a major villain as both Eddie and Venom because producer Avi Arad felt the series had relied too much on director Sam Raimi's personal favorite Spider-Man villains, and not characters that modern fans were actually interested in. Raimi had been hesitant to explore the character due to his "lack of humanity". Arad revealed plans for a spin-off film focused on Venom in July 2007.
Sony was actively developing Venom alongside direct sequels to Spider-Man 3 by July 2008, hoping the character could "add longevity" to the franchise in a similar fashion to Wolverine in 20th Century Fox's X-Men films. Jacob Estes had written a script for the film, but the studio chose to seek out new writers for a different approach from that draft. Estes's draft centered on Eddie trying to reinvent himself as a hero with the help of a tough waitress named Honey Horowitz. Eddie would have gone up against Cletus Kasady, depicted as an opera obsessed killer, who becomes Carnage after biting Eddie. Estes wrote the script with Grace in mind to return while Martin Donovan was his pick for Cletus, and Rashida Jones and Maya Rudolph for Honey. However, Sony was not yet convinced that Grace could serve as the lead actor in the film. That September, Sony hired Paul Wernick and Rhett Reese to write a new script, while industry insiders suggested that Grace should return for the spin-off "because the likeable actor could be a sympathetic evildoer", in response to Venom co-creator Todd McFarlane suggesting that a Venom film could not do well with a villain as the central character. Wernick and Reese had pitched an original story idea for the film to Sony, which Reese described as a "realistic, grounded, a little more dark take on the character". The pair then worked on an outline with Sony and Marvel, who "had specific rules about the villain and the backstory and stuff like that". They had completed a draft by April 2009, which included a role written specifically for Stan Lee, and featured a sequence where the Venom symbiote jumps "from body to body [through a city], and each person that it inhabits ends up becoming really violent and striking someone else and then it jumps to [them]".
Wernick and Reese had turned in a second draft by September 2009, and Reese said that Sony was "pushing forward in whatever ways they push forward". A month later, Gary Ross, who was rewriting the script for Spider-Man 4 at the time, was hired to also rewrite the Venom script, as well as direct, and produce alongside Arad. Grace was "not considered likely" to return to the role then, with the film starting "from the drawing board" and looking to make the villain "an antihero who becomes a defender of the innocent". In January 2010, Sony announced that the Spider-Man franchise would be rebooted after Raimi decided to no longer pursue direct sequels to Spider-Man 3. By March 2012, Sony was still interested in a Venom film and wanted to use it to capitalize on the release of the first reboot film The Amazing Spider-Man (2012). The studio was in negotiations with Josh Trank to direct after Ross had left the project to direct The Hunger Games (2012). Trank was brought on following the release of Chronicle (2012), his directorial debut. He and Big Fan (2009) director Robert Siegel pitched an R-rated Venom film in the vein of The Mask (1994), but producer Matt Tolmach disliked their treatment. In June, Arad and Tolmach discussed Venom connecting to The Amazing Spider-Man, similar to the Marvel Cinematic Universe (MCU) films crossing over in The Avengers (2012). Arad called it "an Eddie Brock story" only, but Tolmach added, "Hopefully all these worlds will live together in peace someday".
In December 2013, Sony revealed plans to use The Amazing Spider-Man 2 (2014) to establish their own expanded universe based on the Marvel properties the studio had the film rights to, including Venom. Arad and Tolmach would produce the films as part of a franchise brain trust, with Alex Kurtzman, Roberto Orci, and Ed Solomon set to write the screenplay for Venom, and Kurtzman set to direct. In April 2014, Arad and Tolmach said Venom would be released after The Amazing Spider-Man 3—which was set for release on May 27, 2016—but before The Amazing Spider-Man 4. However, The Amazing Spider-Man 2 underperformed, and, with Sony "under tremendous pressure to perform [that had them taking] a hard look at their most important franchise", the direction of the shared universe was rethought. The Amazing Spider-Man 3 was pushed back to 2018, and the Venom film, now known as Venom Carnage, was moved up to 2017. Kurtzman was still attached to direct, and write alongside Solomon. In February 2015, Sony and Marvel Studios announced a new partnership that would see Marvel Studios produce the next Spider-Man film for Sony, and integrate the character into their MCU. Sony still planned to produce the spin-off films on their own, but by November they were believed to have been canceled so Sony could focus on its new reboot with Marvel Studios.
Venom was revived by Sony in March 2016, with Arad and Tolmach producing, and Dante Harper writing a new screenplay. The project was envisioned as a standalone film launching its own franchise, unrelated to Sony and Marvel Studios' new Spider-Man films. A year later, Sony gave the film an October 5, 2018, release date, and explained that Kurtzman was not involved with the new project. No new director had been signed, and Scott Rosenberg and Jeff Pinkner were now writing the screenplay. Venom was expected to begin a new shared universe independent of the MCU, and was initially aiming for an R-rating on a smaller budget, inspired by 20th Century Fox's success doing so with the X-Men films Deadpool (2016) and Logan (2017). Sony's director shortlist for the film was believed to include Adi Shankar, known for his dark, R-rated takes "on the properties he grew up on", and Adam Wingard. In May, Sony announced that Tom Hardy would star as Eddie Brock and Venom in Venom, to be directed by Ruben Fleischer and officially begin a new shared universe, later titled "Sony's Spider-Man Universe". Fleischer was chosen after a long search by Sony, and as a longtime fan of the character expressed excitement at the visual possibilities of portraying Venom on film and the potential thematic ideas associated with the character such as duality. David F. Sandberg met with Sony beforehand to discuss the possibility of directing the film, reading its script and meeting with them, but Sandberg had already been approached by Warner Bros. to make the DC Extended Universe (DCEU) film Shazam! (2019), preferring to direct Shazam! over Venom due to that film's crew consisting of people Sandberg had worked with at New Line Cinema. The casting of Hardy, whose son was a big fan of Venom, happened quickly after he left director J. C. Chandor's Triple Frontier (2019) in April and Sony "saw an opportunity to court an in-demand talent". Hardy was paid $7 million for his involvement. Hardy practiced mixed martial arts, boxing, and jiu-jitsu for five weeks for the role.