If I'd been able to decide the plot, maybe this.
Bankers in the City of London and Wall Street have channelled billions of banks money into fake investments dependent on oil staying cheap, as it now is. They've given middle east terrorists the info to blow up the refineries of Saudi Arabia, so oil price will rocket, and banks will go bust. Then they reveal they have access to middle east sovereign funds, the managers of those funds being in league with them, so can save the worlds banking system. And they can reveal what oil facilities the terrorists are going to hit next. All they want in return is the democratic governments of the west to hand over government to them.
Has all the potential for essential Bond features. Super villain, who'd be a banker. Femme fatale, who'd be a sexy banker. Exotic locations, like Bond going to the middle east to battle terrorists, and New York, London, to battle the bankers thugs. And a few high tech gadgets could be thrown in. Be right up to date, combining elements of the banking crisis of 2008 and Islamic terrorism.