If the 2027 world cup in Australia is played during the same dates the group stages will be played at the same time as the NRL and AFL finals. The RUWC will struggle to get much media attention, especially in the AFL states.
But if rugby league wants to be aggressive and not allow any fresh air to Rugby they'll have internationals after the NRL season played during the RUWC finals. Having Fiji, NZ, Tonga, Samoa, PNG, Australia and a touring England playing a tournament would take away media and air from the RUWC. I wonder if League would have the balls to do it ?