Personally i dont think there is anything left that he can plan, he no longer has the power on the island.
The whole source of hes power came from the fact that he had knowledge that neither the losties nor the viewer had, and was able to use that in order to manipulate certain individuals into getting what he wants.
However since the emergence of both MIB and Jacob, nobody on the island cares about Ben anymore, hence his emotional breakdown in front of Ilana.
I do believe that he will challenge Widmore at some point, and prevent him from achieving whatever it is that he wants to achieve. but he will not be a major player in the 'game'. nor will he have any say in the eventual outcome of the series
but thats just my opinion