Although I was thinking about it a lot and was wondering if he’d be able to start rebuilding Rapture. He’d need help, which would explain why more people would be in Rapture, and since the facilities to create Big Daddies exists that would make reason for them to be stomping around still. And perhaps he missed a few the first time in the depths of Rapture that have since gone into disrepair, still lurking in the darkness in search of their lost Little Sister, ready to lash out at any threat that looms in the deep…
And maybe the reason for the Little Sister going back to Rapture was she got pulled into it by people wanting to go back and stop it (People angry after the Splicers got cut loose? People afraid of the power of Rapture? Or greedy for it?) and then decides to take him down for vengeance or perhaps after the party she is with is wiped out.
Grrrr. See what happens, my mind goes crazy thinking of these things and now I want more Bioshock NOW!