BRICS leaders (sans Putin) met this week in South Africa and expanding the group has been on the agenda for awhile so this isn't a surprise. The aim -- at least for China -- is creating a something to counter the G7.
Saudi Arabia is high on the list of countries that would like to join.
Whenever I hear the term BRICS being used I cringe. Naming your group after a Goldman Sachs note doesn't sound like a serious move.