Who knows. Qld cup already has 14 teams, but two come from outside of qld in PNG hunters and Tweed Seagulls. There had been some reports of a push to get a Toowoomba team back into the fold within the next 2 years I think, so not sure how that plays out now. Maybe Tweed heads return to the southern conference? PNG has been a great success and can't imagine them being cut.
In terms of under age teams, with the exception of PNG, all of the Q cup teams are represented in 16s and 18s, although the Gold Coast rep teams play as Gold Coast Green and White, rather than Burleigh Bears and Tweed Seagulls. Toowoomba, Central Crows, and Victoria State teams also compete in 16s and 18s comps, so not sure how this plays out. So Cyrill Connell and Mal Meninga cups are currently 16 team comps.
U20s is a different set up with just the South East Qld teams competing in the FOGS colts comp, which is a ten team comp. Basically covers Sunshine Coast in North, Toowoomba in the west and down to tweed heads. I guess changes will be made if they are committed to 2 x 14 team conferences with consistency throughout all grades/ages.