I really find it hard to guess on Maria. She is still so young though alot could happen. Given all her problems the last few years physically and loss of momentum it wouldnt shock me if she never won another slam, but with her talent and the lack of standout stars emerging in the WTA it wouldnt shock me if she recovers big and wins another 5 or 6 too. Or anything in between.
Kim should be easier to guage since she is near the end of her career. Given all her own statements, her situation, her age, that seems pretty certain. However even she isnt so easy to guage it turns out. A couple months ago I felt far more optimistic about her winning mutiple additional slams than I am now. She seemed to be riding a wave of momentum but it seems to be going away now, but that can change quickly again. She also seems to have a Serena Williams attitude towards the slams vs WTA tour now, but she forgets she is not the insane once in century like talent Serena is to get by on that type of approach.