Most people abhor movie sequels. Not sure why since they usually do well in the box office. But I think the lost love comes from not being as good as the first movie. Part of that comes from character development. With a lot of stories, the main character goes through a change like going from being unconfident to confident. And once that's done that character becomes uninteresting. The sequel now has to depend on plot. James Bond as a character doesn't change at all. All of his stories are sold based on plot and fan base. It's no wonder the actors change so much. They have to to keep the audience interested.
Then came Casino Royale. One of the things Bond doesn't do is fall in love. He's a slam-bam-thank-you-mam kinda guy. Nothing wrong with that. He whips it out, tugs hard, holds tight, and bam. I was talking about the gun. But in Casino, Bond not only whipped it out--not talking about his gun--but let his love interest have it. I'm talking about his emotions.
The man fell in love.
Add the banter between the two love birds, the plot, and a blonde Bond, and you get one of the best Bond movies ever made. But once Quantum of Solace came out, it received mixed reviews. And here we get into franchises.
In my search for a literary agent, I came across an article written by one. He wrote something that made a lot of sense. As writers, we have to know that the publishing industry is a business. As a business, once a platform does well publishers will want to build off it to make more money.
Percy Jackson and the Olympians is a five-book series. I haven't read the books, but I've spotted them as I walk through Borders. There are tons of Trilogies. But they're small potatoes. There are book series that last a dozen books. Some series are even ongoing. Publishers often urge the writer to continue the series before venturing outside of that domain.
It's a business.
The problem, as stated above, is character development. How can a writer continue to make the character interesting? Put her through a lot of crap through plot? Maybe. How about having change occur in supporting characters? Or what about creating new issues with the main character, and adding change in supporting ones?
Here's where J.K. Rowling did a great job. As Harry grew up in those seven years, he changed just like a real person. Shocking. That and the red herrings, plot, the close knit friendships made for a great read. Rowling satisfied the publishing world's philosophy of building on a fan base, but satisfied her fans by creating incredible plot with highly relatable characters.
As writers, we need to keep at heart the art but also keep an eye on the world of business.