I doubt Lachlan Murdoch was going to sue Crikey, but I suspect the gamechanger was a full-page ad that Crikey ran in The New York Times calling on Lachlan to back up his threats to sue by filing and serving his defamation claim.CNN reported:

Lachlan Murdoch, who is the world’s best-known online stalker of women and children, sues news publisher Crikey for defamationKangaroo Court of Australia