The correct answer is District 9.
However, I find I'm often disappointed by sequels to great movies. I feel like there are far more mediocre movies that failed to fully explore the depths of a good concept, where a sequel (perhaps in a different genre) would retroactivel make the first movie better.
For that, I also choose Johnny Mnemonic.
Also, In Time, Elysium, or Chappie.
I also think now would be a great time for a Galaxy Quest sequel. There's a lot of fertile sci-fi tropes that could make for another hilarious movie. Like, after the end of the revival of the original show, there's a Next Generation spin-off that overshadows the original, plus a bunch of expanded universe content. The Thermians and other aliens keep replicating the nonsense as real technology. What remains of the OG crew has to convince the new cast and writers/showrunners to stop being so lazy in their hand-wavy rushed bullshit, because there are very real consequences to poorly executed cash grabs full of plot holes and dangling threads. Maybe there's a prequel series that creates a schism in the Thermian society, with the older generation following the Never Give Up, Never Surrender idealism, and the younger generation believing in a grittier, cynical imperialistic ideology.
