I believe we're in uncharted waters.
I know that last year when we had a washout round it was the first time it happened during Tim Richards' time at the helm which is quite a few years now.
Looking just at Division 6 - Top 5 right now has all the finals competitors in sight:
62 Savers
58 Merrylands
40 Oysters*
37 Penrith
33 GRR**
There are two fixtures to catch up: Georges River (5) v Sydney Harbour (3), and Oatley (7) v Georges River (5)
GRR want at least the game against Oatley to go their way. If Oatley decide to forfeit, that hands GRR a semifinal spot at the expense of Penrith.
So Emus will want the game to be played, but GRR might just win with a BP anyway (38), so the game against Harbour might become irrelevant but GRR know they can't forfeit that, or they lose 2 points and fall back behind Penrith. Harbour could also forfeit and drop to 38 points but won't change their finals spot.
Likely outcome - unfortunately for Penrith - is Oatley forfeit as they're out of finals contention, and Harbour v GRR goes ahead.