England brothers Mako and Billy Vunipola are reportedly in talks with several Super Rugby teams about joining the competition next year.
Both England internationals play club rugby for Saracens which will drop to the lower division next year after they accepted they would not be able to get under the $14 million salary cap this season.
Saracens, who have won four of the past five titles, had already been docked 35 points, and fined $10m for failing to disclose player payments for the past three seasons.
Both Mako, 29, and Billy, 27, are in the final year of their current contracts with the English club.
The Rugby Paper is reporting the pair are attracting interest from Super Rugby sides for the 2021 season.