Yes, it says they have authority (since they are described as kings) but there is nothing to indicate that they do not have anything to do with one another already. We have, right now, a political body of united nations made of of world powers which use the same animal symbols from both Daniel and the Revelation, and a 10 nation committee as part of that body.
It doesn't make sense to dismiss this in favor of some other 10 nation body that will be gathered together at some later date. It does make perfect sense that if the dragon (China) and the bear (Russia) decide to pluck the eagle's wings (America), then Britain would be powerless to stop a world wide shift of power toward a more totalitarian regime, transforming what we know as the U.N. today into a more powerful political vehicle, aided by the 10 rotating members of the security counsel.
The pieces are already set up. It's just a matter of the trigger which will topple the first domino (i.e. the detruction of America). It will be a devestating and shocking time for the world, but the world will move on. This is trigger a huge shift in both economic and geo political power. The nation of Israel will not need to be destroyed; without America backing it up it, too, will be relegated to a lesser power, and then, as the world recovers, a new time of peace will be ushered in. As a sign of that newfound peace, one that would never see another event like the annihilation of another country again, what better symbol of peace could you get than an agreement to rebuild the temple in Jerusalem? A peace agreement in the middle east would be a monumental victory for peace in the world as a whole.
But, it will be a false peace.