If anything: Expand NATO!!! And rewrite it`s charta!
In my opinion it should be a military alliance of the free world, which means that it should not allow dictators to join and should offer membership to other democratic nations from arround the world.
Like Australia, Brazil, Chile, Mexico, South Korea, India, South Africa, Indonesia, Phillipines, South Africa and others.
This would not just give it a new goal and reason to exist, but give everyone the satisfaction of seeing a common enemy being scared: China.