Alright, here is my guess for the next update.
First and most likely is Janet; if you talk to her this update she'll say that she has a rat problem, MC sugguests Albert's help, so my prediction is that MC will call albert to help, effectively getting him out of the basement, while he's out you'll be able to blow up that wall with last dynamite revealing an item to be crafted, a treasure or a cave. When you get back the rat will be dealt with and MC will get a reward from Janet ( it is also hinted in this update with MC's reaction to Janet's photo ). Second is probably Clare; since you still have the totem and at the end of this update you can't enter Estero key's cave because Alia's dad is standing in front of it there is a high possibilty that you'll be able to find a new room there and you'll be able to lure Clare to explore with you and help you through the second room where you'll find more treasure or a path to that isolated chest, you'll probably get a scene with her during that as well. Third and I really hope for this one is Madalyn; simple, the treasure you find in the new areas or the new areas ( new caves ) will give you a scene with her. ( also I hope she gets a Kamasutra page )