Minecraft as i understand it is a game where you mine ( hence the name) ressources and you build stuff out of these ressources, is that correct? There is no story, missions or some final goal to achieve, correct?
Correct. It's completely freeform. It drops you into a world and it's up to the player to be creative and build at their heart's content. There are some boss fights such as a dragon which was originally meant as end-game content, but the game doesn't point you to anything, just leaves you to figure out everything.
Now for some context: It was originally developed by an independent studio, and the demographic I would say was late teens to adults, which encapsulated quite a wide range of ages of people who played it, as it was quite a relaxing game to just be able to have the freedom to build and be creative after a long day. We even had a TBBS server for several years and it was a great way to unwind and make friends.
Then sometime in 2014, the studio was bought by Microsoft, and everything changed. And I do mean everything. Microsoft saw an untapped potential to market the game to a younger audience, the target being 8-12. Then it was put onto Xboxes and then it was pretty much everywhere else. Then the merchandising happened. We're talking crazy Disney-level merchandising, with tons of random merchandise based on Minecraft characters from plushie toys, bath bombs, shampoo, collectible characters, and even LEGO Playsets (Yes, LEGO!). All in all, it's an amazingly lucrative IP and the demo just loves everything associated with it. My nephew got a Minecraft plushie several years ago and adores it and considers it one of the best things ever.
So, to go back to the movie and the reasons it was made: For Minecraft, it's yet another 'Minecraft' product to sell to that same demo. A demo that is far less discerning than adults. They'll love it just like every other Minecraft product because they can't get enough of it, and that's why it will be a success. Don't understimate the power of young kids. Once they latch onto something, it's almost impossible to let go until they grow out of it. Even if the story is bad, it will still be deemed a financial success because of this, because the end-result is that it's part of a very successful IP.
