If what you say is true, then it was an overtly stupid plan from his side. It is possible as his actions, body language and statements show that he is very immature and foolish.
(for e.g. he had once given a statement from London when asked by media that what do you wish to say about Fiza...he said 'bhadiya cheez hai'!!

I guess you might have read that. And it created a stir at that time as Fiza said that how can he call her a 'cheez' that can be used and thrown away like soap or clothes.
also from his kalka mla times, it is well known that he is a womanizer and an alcoholic too, further he takes charas also (from what i have heard, ofcourse i have not supplied it to him so cant be sure

)
If he thinks that the women of kalka or the general public will gain sympathy by him coming back to fiza, then he has had it already. How can he expect sympathy for ditching his innocent wife and children in middle age, changing his relegion and acting like an 18 yr old?
you said it right, his game is up either ways.
Baaki I agree that fiza is a very cunning lady, I will not be surprised if she has some inside info about him and or their family.(and quiet honestly, I would not have been surprised if she would have tried to contest the next election, having gained so much sympathy about him ditching her. Now that he is back, the question of sympathy does not arise as much)