Sameh Bayda and his wife Alo-Bridget Namoa, both 19, on Wednesday had their existing charges upgraded to also include "conspiracy to do an act, or acts in preparation for, or planning, a terrorist act or acts".
The pair, who have been in custody since their early 2016 arrests, did not appear via video link when the case was mentioned in Sydney's Central Local Court.
Prosecutor Alison Edwards said the bulk of the evidence had been served.
"The prosecution is ready to proceed to committal," she told the court.
But Geoffrey Foster, appearing for the pair, requested the case be listed only for mention on March 15.
Magistrate Alexander Mijovich was eager to see the matter move on, given there was no new material in the brief of evidence.
"It needs to proceed, it can't just keep on meandering along now that they've sorted out the charges and the brief," he said.
The upgraded charges carry a punishment of life imprisonment and Mr Foster agreed they were substantially more serious charges.
"Look, in relation to the additional evidence, the instructing solicitor Zali Burrows is more privy to the further evidence that may or may not be tendered in court," he said outside court on Wednesday.
Mr Foster said Ms Burrows would need to take further instructions regarding a plea and could not comment on the clients' welfare.
Police said the new charges came about after an extensive NSW Joint Counter Terrorism Team investigation.
Court documents have previously revealed Bayda allegedly possessed documents from al-Qaeda, as well as instructions for a homemade bomb and a guide for a stabbing attack.
Namoa is accused of possessing a hunting knife and documents detailing how to make an improvised explosive device.
Namoa, who allegedly referred to the couple as an "Islamic Bonnie and Clyde", had also been charged after refusing to answer questions at a NSW Crime Commission hearing.
Her solicitor has previously argued she was merely a "terrified young woman" whose refusal to answer questions was driven by fear.
In September, a court heard Namoa had an "infatuation with violence" and said she could watch beheadings "all day".
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