Rob Zombie's The Blob

The Blob is a well-worn horror concept, with the deadly alien amoeba surfacing on screens in 1958 and again in 1988. Since then, several attempts have been made to bring the extraterrestrial goo back to the screen, most notably courtesy of Rob Zombie. The rocker turned film director was attached to a remake in 2009, with concept art for the new version even emerging, but then left the project to be replaced by Con Air's Simon West in 2015. 'My gut told me this was not a good place to be,' Zombie later said, according to Bloody Disgusting. A decade on, West is no longer attached to the remake either - with delays and a dispute over the rights thought to be behind its non-appearance in cinemas - and the whole thing appears to be hanging in limbo (Picture: SCOTT MOORE/REX/Shutterstock)

Tobe Hooper's Spider-Man

Spider-Man might not be something you immediately associate with horror, but in the hands of Texas Chainsaw Massacre director Tobe Hooper, it's a different story. He was set to give Spidey a horror makeover in the 80s, courtesy of the infamous Cannon Films, and reports suggested it had more in common with The Fly and The Wolfman than the Marvel Universe. Ultimately though, it never went before the cameras, after the character's co-creator, Stan Lee, voiced objections to Spidey being some kind of body-horror mutant. The project was subsequently scrapped, and an attempt to film a completely reworked version later in the decade also came to nought due to the failure of the studio's other superhero flicks (among them Superman IV: The Quest For Peace). With Hooper having passed away in 2017, we'll now never know what might have been (Picture: Frederic SOULOY/Gamma-Rapho via Getty Images)

Freddy vs Jason 2

It was the team-up horror fans had been dreaming of when Nightmare on Elm Street's Freddy Krueger and Friday The 13th's Jason Vorhees went head to head in 2003. And you'd think that kind of combination would be ripe for a sequel. It very nearly got one, with the plan being to add The Evil Dead's very own Ash into the mix. So what happened? Well, quite a few things actually. Including the actors not being too keen on a sequel, the spiralling budget, and makers New Line Cinema being opposed to an ending which would see Krueger killed off for good - all of which pretty much put an end to this one before it could become a reality. Instead, it became a comic book series which ran from 2007-2008. We're not expecting the film version to become a reality any time soon (Picture: New Line/Kobal/REX/Shutterstock)