I think they will be dull of explanations and answers. Furthermore, I am convinced that in the next episode we will really see what the Island really is, and how Jacob and MiB came to be on that Island. Maybe we'll have an answer what's their purpose, or who is the mysterious boy. I think that we will finally see how is it possible for MiB to turn into black smoke and other people - or, how Jacob stole his body. If they don't explain those in the next two episodes, they would have to explain it in the finale, which would make for a really sucky finale.
Personally, I believe that the three of our most mysterious characters are on the Island for a very, very long time and have some sort of connection to each other. Maybe they are connected by blood, thus sharing similar powers. I am really looking forward for the next episode. Are you?