Well...Definitely Yes,
I answered yes only if Zardari continues what he is doing.
So if he continues what he is doing, then there will be mid term election according to me.
Well, it seems like Nawaz Sharif will be able to get the government. However, there will be emerging of PAKISTAN TEHREEK E INSAF on a large scale in NWFP and in PUNJAB. So i believe, Imran Khan, inshAllah, be the one of the major opposition parties coz at that time PPP will be with Nawaz Sharif Govt.
Moreover, Nawaz Sharif will also not be able to survive for 5 years and soon there shall be new election which will bring Imran Khan as the Prime Minister of Pakistan.
Thats my opinion.