If this is true at all, then i fear that Imran Khan will lose his good supporter, many people, who loved him for taking a stand against certain political party (famously called MQM), will be disappointed. He should concentrate and increase the public support instead of trying to form alliances. Alliances without public support tend to disappear quickly.
MQM always joins the government (had PML-N is sindh govt., MQM would 1000% joined PML-N). I think Imran Khan should not go down to this path, indeed a dangerous path.