This is far from an easy question to answer and there are many factors that can make a difference.
These are some of the factors that I'll analyze over the course of the series and see how they may or may not apply to various well-known film series.
- Keeping the cast and crew consistent throughout
- Planning the story out ahead of time, or making it up as you go along
- Staying true to either the source material or the original film
- Waiting a long time between sequels or rushing out the next film
- How much continuity is kept between films and if each film works on its own
- Keeping the series fresh and introducing new elements or characters
First, let's look at keeping the cast and crew the same throughout the series, and how much effect that may have on the quality of the films.
Often sequels are criticized as a cynical, unnecessary cash-in if they don't have the original creators and cast members involved. If the directors, writers and/or stars return it can lend it an air of legitimacy.
Bringing the creators back for sequels should theoretically make it easier for them not to stray too far from the tone and intent of the franchises' beginnings.
Obviously, losing cast members can alienate audiences who may be upset to see their favorite characters played by a new actor or absent entirely.
Bringing the creators back for sequels should theoretically make it easier for them not to stray too far from the tone and intent of the franchises' beginnings.
Obviously, losing cast members can alienate audiences who may be upset to see their favorite characters played by a new actor or absent entirely.
The Star Wars franchise is an interesting example. For the original trilogy, the cast was very consistent. Of course, the main three actors and even a lot of the supporting cast returned for all three. It might have been quite odd for audiences to see a new actor portraying Luke, Han, or Leia and I think the movies definitely would have suffered from a major recast or writing out a main character.
When it came time for the prequels, most of the main cast was new as it was set decades prior to the original films. This was definitely something fans complained about as the absence of Ford, Fisher, and Hamill was sorely felt, especially in comparison to the much-maligned performances of Jake Lloyd and Natalie Portman.
However, they did attempt to bring back cast members whenever possible, such as Anthony Daniels as C-3PO and Ian McDiarmid as Emperor Palpatine, with this undoubtedly being to the films' benefit as they provided a necessary link to the original trilogy.
Obviously, Star Wars was, at least at one point synonymous with George Lucas, who wrote and directed the first film. This gets a bit complicated as he didn't direct the next two films. He got a story credit on The Empire Strikes Back and wrote the story and co-wrote the screenplay on Return of the Jedi. Lucas was a very influential producer on the sequels and the success of the original trilogy is often greatly attributed to him. However, it's worth noting that The Empires Strikes Back was actually directed by Irvin Kershner and that is considered to be as good, if not better than the original by many fans.
For the prequels, Lucas would write and direct all three. Usually having the original creator back in control is seen as a positive thing. If they had been made by some other director it may have been seen as an unnecessary addition solely made for money.
Unfortunately, the films ended up causing an extremely divisive reaction among the public and this shows that having the original creator back for the new installments is far from a guarantee of artistic success.
In fact, this may have actually been a negative since there are plenty of filmmakers who could have made better prequels given the chance.
Once Disney bought the IP, many new directors were brought in, while still keeping on some Star Wars veterans like Lawrence Kasdan. Many actors returned to reprise their roles, but the main characters were pretty much all new faces, especially in Rogue One, which brought back a few known characters in small parts, but with new actors, sometimes aided by CGI. This didn't seem to hurt as the new films were box office hits and generally well-regarded among fans and critics. This was one case where the fanbase was ready for new filmmakers due to the original creator having already made polarizing additions to the universe.
It's not surprising Star Wars could still be popular without the original cast, as it was never hyper-focused on a particular actor, especially compared to series like Indiana Jones, Die Hard, or Rocky. Sure, Luke was clearly the main character of the OT, but many lesser characters ended up being fan favorites as well, even ones that didn't say anything or have more than a minute of screentime.
A lot of people love the franchise for the overall world and not just any one actor or actress. Because it's a whole galaxy with thousands of years of history it's much easier to tell stories in that fictional world that don't even feature the same characters, much less the same cast. The animated shows are great examples of this, like Rebels that focuses on new characters and the voice actors who have been in Star Wars before are mainly relegated to supporting roles.
In fact, this may have actually been a negative since there are plenty of filmmakers who could have made better prequels given the chance.
Once Disney bought the IP, many new directors were brought in, while still keeping on some Star Wars veterans like Lawrence Kasdan. Many actors returned to reprise their roles, but the main characters were pretty much all new faces, especially in Rogue One, which brought back a few known characters in small parts, but with new actors, sometimes aided by CGI. This didn't seem to hurt as the new films were box office hits and generally well-regarded among fans and critics. This was one case where the fanbase was ready for new filmmakers due to the original creator having already made polarizing additions to the universe.
It's not surprising Star Wars could still be popular without the original cast, as it was never hyper-focused on a particular actor, especially compared to series like Indiana Jones, Die Hard, or Rocky. Sure, Luke was clearly the main character of the OT, but many lesser characters ended up being fan favorites as well, even ones that didn't say anything or have more than a minute of screentime.
A lot of people love the franchise for the overall world and not just any one actor or actress. Because it's a whole galaxy with thousands of years of history it's much easier to tell stories in that fictional world that don't even feature the same characters, much less the same cast. The animated shows are great examples of this, like Rebels that focuses on new characters and the voice actors who have been in Star Wars before are mainly relegated to supporting roles.