Other remote possibility (I mean remote possibility) is that Musharraf might resign and join PML-Q as President of the party, as if it was me in his place, I would have done that (but maybe Musharraf is too old for that and have no one to follow him in PML-Q, as Pakistani politicians with mostly retarded voters need heir to survive ... one big reason behind PPP survival in Pakistan and Congress survival in India).
Why would you or lets say Musharraf should join PML-Q? No one joins a party just because some people like/love/obey you. PML-Q is not a saints party, we all know, getting billions in loans and using political power for write-off and many other problems (not to forget mishandling of Lal Masjid) and you will still like to join PML-Q? I thought you'd rather join MQM (the other saintly party).