I just finished the game twice trying the lethal approach (with the darker ending) and non lethal approach. But on both endings Corvo Attano dies ( of old age i'm pretty sure) which makes me very sad, so i don't think there will be a sequel (or atleast with Corvo in it).
NOOOOOOOOOO, why did I read this!!!!!!!!!? Thanks for telling me the end without warning, you numbnut! As soon as I read the "d" word, I stopped, but it was too late.