The London Broncos' position remains unsettled, while questions about the Super League's scheduling and title sponsor also remain open.
Talks over NRL investment in the Betfred Super League have continued beyond the October 15 deadline originally set for an agreement.
The NRL and Australian Rugby League Commission (ARLC) faced criticism over a reported demand to promote London into the competition for 2027.
The ARLC is understood to have rejected the request, saying, "no well-run organisation would" agree to those terms.
A dispute over funding has added another obstacle.
Super League clubs were reportedly surprised that the Rugby Football League (RFL) had sought unlimited funding as part of the proposed arrangement.
A deal intended to help secure the English competition's future is still understood to be in progress, with an agreement expected in the coming days.
However, the investment is now expected to begin in 2028 rather than 2027, as negotiations over its terms continue.