Although politicians involved in the preliminary discussions denied that they were seeking to sideline al-Sadr's bloc, comments by Deputy Prime Minister Barham Salih of the Kurdish Alliance on December 12 clearly suggest that the main cause of the current political crisis are militant politicians like al-Sadr.
There are three possible outcomes, it seems to me: 1, al-Sadr's bluff has been called and he stops threatening the gov't; 2, that al-Sadr is prepared to go it alone and begin all-out war to take over the whole country; and 3, that al-Sadr will continue to threaten, but not leave the gov't until he has his way on everything. I don't think any other coalition could prevail within the constitutional boundaries, and I also don't think any other coalition could hang together because they're all opposed to one another as well.
I mean, really, when has it been said, "Islam is all about compromise and diverse opinions" ?