A judicial review is on the cards as part of the latest twist in the Kim Dotcom saga

Justice Minister Paul Goldsmith has signed the Megaupload founder's extradition order, after Dotcom has fought for a decade to stay in New Zealand.

It means he'll likely stand trial in the US.

Barrister Clive Elliott KC says the review is the next step, which would question the minister's statement that he'd carefully considered the matter.