Arsenal, Chelsea, Liverpool, Manchester City, Manchester United and Tottenham are among 12 clubs who have agreed to join a new European Super League (ESL).
The ESL said the founding clubs had agreed to establish a "new midweek competition" with teams continuing to "compete in their respective national leagues".
It says the inaugural season "is intended to commence as soon as practicable" and "anticipated that a further three clubs will join" the breakaway.
The plans of the ESL also include launching a corresponding women's competition as soon as is possible after the men's tournament starts.
UK Prime Minister Boris Johnson, Uefa and the Premier League condemned the move to launch a European Super League when news of it broke on Sunday.