1) In the year 2030
The National Intelligence Council just published its projections for the year 2030. Politico reports U.S. out as sole superpower by 2030:
And the intelligence community does not believe the United States will be supplanted as the world's only superpower by another country.
"The replacement of the United States by another global power and erection of a new international order seems the least likely outcome in this time period," the report projects.