Yes it does, Richard Dickson. The story of Wikus and CJ is not over, though it could be left like this and we'd all probably be more or less satisfied. I'm not sitting here demanding a sequel for the sake of a sequel. I believe this story can and should continue and potentially wrap-up those hanging "plot points".
What is this movie at all, Brad? It can be pithily summarized as: South Africa Alien Nation with lightning guns. Based on the premise alone, D9 could have been a generic scifi action movie. That it isn't has nothing to do with some magical recipe for success and everything to do with Neill Blomkamp's creative choices in telling this story.
Unless the sequel was made by Bret Ratner, your assertion holds no water. Of course Blomkamp could screw the pooch but he deserves the benefit of the doubt at this point. Your unwillingness to provide that is because you are a jilted lover whose heart has not yet healed. I know that the SW prequels and the Matrix Sequels hurt you, pal, but it'll all be okay.
EDITED TO ADD:
Originally Posted by Brad Millette
It's because this story was about Wiklus' growth as a person, not about a big alien escape. It was about a man reassessing how he views the world, and himself in relation to that world, and reassessing what he believes in. What happens next is irrelevant. It's not important to the actual story. It's just meaningless plot.
Ridiculous. If the movie were 3 hours long and showed more of Wikus' growth as a "human" in his new form with additional stuff concerning CJ coming back and whatever else and ending with Wikus being returned to human form and now an advocate of the prawns and an all-around decenter sort of guy... I doubt you'd be like "MEANINGLESS PLOT!" if it was all handled with the same assurance of execution that the movie we do have contains.
In short, it is not meaningless plot but merely an extension of what we've already seen. If you think Wikus has no character arc beyond this point I don't know what to say except: you're wrong.