Every great long-running film franchise came from one successful original film that made enough people happy and drew in enough money for producers to demand many sequels and instalments.
As we're halfway through the year, and with a great selection of films still to come in 2017, we're looking at seven films that could start a long-running series of their own...
Baywatch - May
The slow-motion TV show delighted (mostly male) audiences for a decade from 1989-99, and has finally made it to the big screen 18 years after it went off the air.
Zac Efron and Dwayne Johnson's comedy replaces the original TV show's drama, as the cast is stacked full of the eye-candy (of both sexes) that you'd expect from a Baywatch film.
With the TV show boasting a staggering 242 episodes, there is more than enough material for many subsequent films, and with the star power of The Rock, Zac Efron and Alexandra Daddario, it has the potential to pump out flesh-flashing sequels for years to come.
Valerian And The City Of A Thousand Planets - August
Leon: The Professional and Lucy director Luc Besson has spent five years working on getting the French comic series Valérian and Laureline to the big screen, and the result is the sci-fi action-adventure film fronted by Dane DeHaan and Cara Delevingne.
The popular French sci-fi comic series that ran from 1967 to 2010 sold over 10 million copies around the world and has been translated into 21 languages, proving that there is a hunger for the special operative pair who help to protect Alpha, a sprawling metropolis which hosts species from across the universe.
If Besson - who has experience with sci-fi action, having directed The Fifth Element - is able to deliver what many, many fans of the comic series will be expecting, then we could have another young adult franchise to rival The Maze Runner or the Divergent series.
Atomic Blonde - August
Adapted from British writer Antony Johnston's 2012 graphic novel The Coldest City, Charlize Theron takes on the role of Lorraine Broughton, a jewel in the crown of MI6, tasked with taking down a ruthless espionage ring in Cold War Berlin.
The trailers, which have shown the action in its violent, relentless best has drawn many comparisons to John Wick, which is no surprise considering the Atomic Blonde director David Leitch co-directed the violent Keanu Reeves action film, plus Charlize Theron trained with Reeves while he was preparing for the physically-demanding role for the sequel.
With John Wick and its sequel already a huge success, there is obviously an audience for the type of realistic and brutal fight scenes, and if it has success with this initial film, Atomic Blonde has the chance to produce many more sequels.
The Dark Tower - August
Based on Stephen King's award-winning dark fantasy book series, which the famed author has described as his magnum opus, giving any potential franchise hopes more than enough material to put into ten or more films.
The plans to get it onto the big screen has been ongoing for a decade, and the film is finally set to hit cinemas this summer starring Idris Elba and Matthew McConaughey roaming and an Old West-syle parallel universe.
With an impressive leading pair, and science fantasy films being popular at the moment, thanks to the likes of Doctor Strange, Lucy and Thor, The Dark Tower has all the ingredients to be a fan favourite film series for years to come.
It - September
Another creation from the twisted mind of Stephen King (paving the way for a King multiverse?), Pennywise the Clown returns to terrify kids and adult alike 27 years after the popular TV miniseries in which Tim Curry donned Pennywise's clown costume.
This time round, Bill Skarsgård plays the killer clown, and if the trailers are an accurate indication, it is set to be the most nerve-jangling, terrifying horror film of 2017.
While the 1990 TV series covered the entire contents of Stephen King's book, this film will only cover the first half, and if this is a box office success (which it almost certainly will be), then expect Pennywise to return for more instalments.
The Snowman - October
Michael Fassbender stars as detective Harry Hole in the British crime drama, adapted from famed Norwegian writer Jo Nesbø.
With an impressive cast line-up, including Rebecca Ferguson, J.K. Simmons and Chloë Sevigny, The Snowman takes the story of the seventh (and possibly most famous) instalment from the 11-installment Harry Hole series.
Similar to The Girl with the Dragon Tattoo - which has seen fans demanding sequels to the 2011 American remake - and with a wealth of material to mine from, we could be seeing brooding Harry Hole crime dramas for many years to come.
Jumanji: Welcome to the Jungle - December
Obviously not an original film, but the reboot/sequel is so far removed from the Robin Williams '90s classic, that it feels like an almost completely different idea altogether.
In detention, four teenagers discover an old video game and are sucked into the jungle adventure, with Dwayne Johnson, Kevin Hart, Jack Black and Karen Gillan playing their in-game characters.
You can bet your bottom dollar that if this makes the money that is expected of it, then we'll get many more jungle adventures.