There are some ideas on the table, actually. Imperfect Dark was considered. Perfect Almost-Dark is also in discussion, as is Perfect Dark-But-Not-So-Dark-You-Have-To-Turn-On-A-Light-To-Get-To-The-Bathroom-But-Dark-Enough-That-You-May-Trip-Over-Your-Dog.
GT: CrampedSultana PSN: Ana Kerie Pawn: Zarianna. CARPE LAMA GLAMA
It doesn't need any sequels it's a game that can rest not every genre needs to be beaten into the ground.
This, it's the expectation people have that every good game needs a sequel that kills off any fond memories of any good games ever. Look at cod and that attrocity that is ghosts, not every series needs to become a bludgened to death horse.
If gamefaqs didn't have a levelling system i'd be gone.