Sequel in works??

Rating: 8/10 (16 February 2010)

First I'm not here to bash this film in any way. It has an intelligent socially relevant story line with exciting screen imagery...it has a cast of believable actors and great CGI integration, good directing and the format (told as a documentary) are all carried off well with few flaws. I liked this film and I'm not a sci-fi fan boy. With all this film has, it also has some logic gaps in the story line.
First, we are not let in on exactly why the aliens became too wretched to fly their craft any longer.
Second, we are not told how a civilization capable of the technology the 'prawns' are found with, appear to have so many individuals who function on such a low social or technological level (were the "prawns" a race of slaves)?
Third, why are the two aliens the human protagonist is in contact apparently the only intellectually evolved aliens we see?
Fourth, after the bonding between the human and the Aliens he sacrifices himself to help escape, the Alien 'promises' to return and 'fix' the alien mutation experienced by the human protagonist.
Seems to me these gaps were installed to open an opportunity to answer them in a sequel - "District 10"??