"Who's next"?

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Across
  1. 3. the Mainland of Southeast Asia, is the continental portion of the region.
  2. 5. The country with the largest area in the world
  3. 7. is the largest country in South America by area and population
  4. 10. The country with the largest population in the world
Down
  1. 1. is one of the BRICS countries whose flag has six colors
  2. 2. The country with the One Belt One Road plan
  3. 3. is the country with the most significant number of islands in Southeast Asia
  4. 4. The organization includes two of the world's most populated countries, 10 of which account for nearly half of the world's population.
  5. 5. The seventeenth annual BRICS summit in 2025 will be held in the city of …
  6. 6. The northern or southern half of Earth on either side of the equator
  7. 8. Association of Southeast Asian Nations
  8. 9. The New Telegraph estimates that in 10–15 years, the BRICS countries will control half of the globe