It's a minor miracle whenever any movie gets made. I know; I've worked in that industry for a long time. The number of elements you need just to bring together a single movie is head-spinning. So for them to be so ambitious as to plan a series of movies that tie together, then one movie that brings them all together... that takes balls of steel.
Thank god it was successful, because it's spawned a franchise that I believe is one of the best of all time. I've always liked the idea of the larger world around the characters being developed. Each individual is just a cog in the larger machine. With the Marvel movies, TV shows, games, etc. that is exactly what they have done. Like a photo that is made up of many smaller photos, they have all painted a larger image.
This is what I want to do with Relic Worlds, and what I have been striving for. Even though this particular series focuses a lot more on one central character, I have developed a whole section of the galaxy complete with star systems, planets, corporate governments, etc. The idea is for there to be a larger story arc in addition to the smaller story told about Lancaster James and his close friends.
It's sometimes hard to know whether a company is doing this just to make more money, or if they're truly expanding to make a larger story, but if it's telling a good tale, I'll bite.