So Bishop Nazir-Ali is to sort of go it alone, in the Middle East, doing a job of reconciling Muslims and Christians where Christians are under some pressure. Sounds like a useful job.
Except, of course, it gives him the freedom to do as he wishes regarding GAFCON and the like, to ordain (let's see who with) and to organise. That's why he is going very early. He wants a role that he can never have within the Church of England - no more in the way of promotion, but also nothing much else to say other than his mantra of lack of Christian freedoms in Muslim areas or within contemporary British culture that advances social equality.
Yes, he will do more and be prominent elsewhere. A lot will be behind the scenes, but a great deal will not be. Bob will be the Archbishop of the Anglican Church of North America, and Michael will be free to gather and organise, unless he becomes the Archbishop of the Anglican Church of Europe.