If mushraf bring back the democracy, he will be opening the gate for benazir to become the PM (Nawas sherief is in exile).
With democracy back in PAK, as usual the new ruler will take over the later one. A corruption charge, criminal charge will be executed against him and will force him to go on exile or being killed.
The only out of it is to reach an agreement with benazir, allowing benazir to enter pakistan and free movement with US working as a mediator in between this two. in turn benazir might had agreed to have a soft corner towards mushraff after she takes the charge.