It’s still a long shot but worthy of consideration, from RBC:
With an already precarious one-seat majority, the Liberal-National Coalition government risks turning into a minority government should the High Court uphold Section 44 of the Constitution and rule the current Deputy PM and leader of the National Party ineligible for Parliament.
There must also be some risk that other government MPs are in breach of the citizenship requirements under this Section. Four Senators are also in possible breach.