If it were happening now, then these are your 2 divisions.
Catalan
St Helens
Warrington
Wigan
Leeds
HKR
Castleford
Hull FC
Huddersfield
Wakefield
Salford
Leigh
Toulouse
Featherstone
Batley,
Halifax
Bradford
Whitehaven
London
Widnes
If it is happening at the end of 2022, then it'll make for a interesting battle at the foot of the SL table with essentially the bottom 2 going down, whilst the real battle will be for mid table in the championship. I can't see London making the grade, whilst Newcastle have set their stall out by going full time....if they get their TV deal sorted, Monday nights could be better than SKY with Wigan v Saints IV
The other thing to consider is how promotion and relegation will work between the 2nd tier and those community clubs cast adrift.....the likes of Sheffield, London Skolars.....will there be a pathway for these clubs or is the drawbridge being pulled up? Clubs like Barrow have been fantastic this year....it would be criminal to take away their chance to continue to grow.