Hollywood's obsession with revisiting lucrative franchises isn't going anywhere, but sequels aren't always such a bad thing.
The world is a better place thanks to the likes of The Empire Strikes Back, The Godfather Part II and Airplane II: The Sequel... okay, not so much that last one.
Then there are less obvious examples such as Infernal Affairs II, The Color Of Money, Before Sunset and Mad Max: Fury Road.
We could list films all day, but the point is that not all sequels are shameless cash-ins, pale imitations or inferior siblings - there are times when the original can be enriched through further exploration in a companion film.
Countless sequels have ended up lost in the depths of development hell, and while some emerge years later like M. Night Shyamalan's long-mooted Unbreakable follow-ups, there are other promising ideas which never see the light of day.
From elusive final chapters in unfinished trilogies to the long-awaited follow-ups we've been promised since time immemorial, there are tantalising sequel ideas out there that simply must be pushed into development post-haste.
10. Bill & Ted 3
When we last saw Bill and Ted, they were battling their robot doubles, playing in a band with Death on bass and shaking the pillars of heaven and hell alike.
Sure, their Bogus Journey wasn't quite as far-out as their original romp through time, but Wyld Stallyns ruled nonetheless, and the '90s nostalgia would be off the charts if they returned for a third outing.
Talk of Bill & Ted 3 dates back decades, but it took key steps towards the realm of reality in recent years when lead actors Keanu Reeves and Alex Winter pledged their commitment to the project.
According to Keanu, the movie will be set in London and find the aged Wyld Stallyns tasked with writing a song that will save the universe. Presumably there'll be some phone booth-powered time travel in there too.
The actor told Metro that the will to make the movie is there, but red tape is holding it up in "showbusiness land". Hopefully 2018 will be the year it breaks through that tape.