It would take more than 40 years for the middle east to militarise for any sort of campaign, (outside of the cities much of the Middle East is in almost medieval conditions) and longer still before they managed to get past their own disputes and mobilise on a country outside the Middle East.
I was thinking the other way around where the West basically blast it into null existence. I've been to most countries in the middle east, and regardless of what the media says, I would hardly say its medieval. Politically unorganised, perhaps, but people are modern and educated even in the smaller towns and even some villages.
Overall, I think it's not right to rule out the possibility of war 40 years in advance. I highly doubt that in 1900 people in Germany were going "Hmm, that kid who was born in Austria? We should keep an eye on him, he might be up to something. With this war we might have in a decade or so, lord knows what effects it will have on him. Might ruin everything in about 40 years..."
If we could predict wars like that, they wouldn't happen at all. Knowing we can't, I think it's safe to say that to deny that a war will take place in 40 years or even 10 years, really, based on current affairs is a short sighted decision to make. Don't you agree?