Pacific islands teams Moana Pasifika and Fijian Drua have been granted conditional licences to join a proposed Super Rugby competition next year.
England have been drawn alongside Japan and Argentina for the Rugby World Cup 2023, while Ireland and Scotland will face defending champions South Africa.
The 2023 Rugby World Cup in France has been extended by one week to allow all teams at least five days preparation before pool matches.
Gregor Townsend says "reality" is setting in with Scotland's draw for the Rugby World Cup 2023, while Ian Foster says it will be "special" to play hosts France.
Fiji wing Nemani Nadolo marked his return to Test rugby with a hat-trick as they secured an emphatic 38-24 Nations Cup victory over Georgia.
England have been drawn with France, South Africa and Fiji in pool C at the Rugby World Cup 2021.
Three members of Fiji's squad have tested positive for coronavirus at their training base in France as they prepare for the Nations Cup.