Mario Yela appeared in the Wynberg Magistrates Court on Tuesday.
He allegedly killed his children Maximo and Octavia at a rented holiday home in April.
He will, however, have to wait until 28 July because the court will first rule on whether the defence can access the police docket.
Post-mortem reports are also still outstanding.
Yela's currently being held in a single cell at Pollsmoor Prison.
His ex-wife found the bodies of their three-year-old twins on the day he was supposed to return to Spain.
