Economic reports says that the situation will not change much about the 2016 in GCC countries,so whats the best market to establish new business ..?

At the first place i recommend UAE

it's the only country in GCC knows the meaning of busniess. 

 Establish a new business at first needs a Political stability,presenting all facilities from goverment sectors to attract and encourage these investors, tax exemptions, facilities at the entry and exit of the currency (transfers), the law is above all does not distinguish between a foreigner and a citizen, when you find an answer to these questions is the right place.

Regards

If the oil futures market is correct, Saudi Arabia will start running into trouble within two years. It will be in existential crisis by the end of the decade.

The contract price of US crude oil for delivery in December 2020 is currently $62.05, implying a drastic change in the economic landscape for the Middle East and the petro-rentier states.

The Saudis took a huge gamble last November when they stopped supporting prices and opted instead to flood the market and drive out rivals, boosting their own output to 10.6m barrels a day (b/d) into the teeth of the downturn.

Bank of America says OPEC is now "effectively dissolved". The cartel might as well shut down its offices in Vienna to save money.

As oil prices continue to wallow at lows not seen for more than decade, petroleum exporting countries in the Middle East are looking to reform their economies so that they can weather the shock of far lower oil revenues – and prepare for a future after fossil fuels.

Oil prices rose as much as 7 percent on Friday to above $31 in their largest weekly rally in three months, as a cold front sweeping the U.S. and Europe supported prices. But that's cold comfort for the oil producers, however, which have seen prices fall from $114 a barrel in June 2014 to current levels. As such, the question of diversifying traditionally-oil based economies and reducing the reliance on oil has become a key issue in the Middle East.

Suhail Bin Mohammed Al Mazrouei, energy minister of the United Arab Emirates (UAE) told CNBC on Friday that the Emirates were moving away from its dependence on oil.

"In the UAE we are diversifying the sources of energy…and also we are diversifying the sources of income. We are developing our economy, and year on year we are seeing that the non-oil economy's contribution is growing," he told CNBC on the sidelines of the World Economic Forum (WEF) in Davos.