By slicing through Al Anbar Province (Sunni), this new nation would link with Jordan. Perhaps some arrangement could be made to allow Iran and Shia Iraq a conduit to the Mediterranean in return for a peace settlement. As Trump says, think big.
I have come to believe that Turkey will allow or disallow the formation of this nation. For that to happen, the Turkish Kurd problem must be resolved.
I have no idea how that can come about
The traitorous Euro former allies will probably never allow a solution