Making a single hit movie is one thing, but keeping that momentum rolling for an ongoing cinematic franchise is a whole other challenge, and one which often causes once-promising movie series to eventually sputter out.
While in many cases movie franchises simply die off due to declining audience interest, there are sometimes instances where a single creative decision clearly marked the series' decline.
This can be a business decision, such as shooting for a squeaky-clean family-friendly rating or hiring a certain unqualified filmmaker, or a creative one, such as killing off a beloved character or taking the story in a wholly un-commercial direction.
Whatever the decisions were, in each case they drained each series of their remaining value, whether critically or commercially (or both), ensuring that future prospects look rather dim indeed.
That's not to say these franchises can't ever be redeemed - just look at how successfully Halloween was revitalised with its first good movie in literally decades - but simply that their boom period of success is long gone, and it'll take some major leg-work to get things back to a satisfactory level...
Stay at home dad who spends as much time teaching his kids the merits of Martin Scorsese as possible (against the missus' wishes).
General video game, TV and film nut. Occasional sports fan. Full time loon.