If there's one thing Hollywood loves more than itself, it's a movie with franchise potential. Nowadays, executives have no choice but to question whether what it is they're green-lighting is capable of spawning further films, should it turn a profit.
But sometimes even Hollywood struggles to get a sequel off the ground, years pass, and before long it feels like there's no way in hell that a particular follow-up will ever see the light of day. Either too much time has passed and people have lost interest, or the necessary budget is too large, marking said sequel as far too risky a venture.
And then out of nowhere it happens: a sequel we'd completely lost hope in suddenly finds its way onto a studio's upcoming release slate, years - sometimes even decades - after it seemed like everyone involved had moved on.
This can happen for a number of reasons, but for the most part it comes down to all the pieces suddenly coming together at once; a combination of the right creative people becoming free, a sudden revival in public interest, and a studio willing to take a risk. The worst case scenario, of course, is that a lost sequel finds its way into production because somebody needs to make a fast buck. When will they learn?