At home, Zimbabweans have been divided over how to mourn a man once hailed for ridding the former British colony Rhodesia of white-minority rule but who later purged his foes in a campaign of massacres and executions known as the Gukurahundi.
On Tuesday, a government minister said the burial was planned for Sunday, a day after the state funeral.
The body will arrive in the country "any time on Wednesday", she said.
Meanwhile, his body is expected to arrive in Zimbabwe on Wednesday before being taken to Rufaro Stadium in Mbare township on Thursday for public viewing by the nation.
The specially chartered flight carrying Mr Mugabe's body is expected to land in his home country at 15:00 (13:00 GMT), family members told Reuters news agency.
Mugabe is proving as polarising in death as he was in life, as the fight over where he will be buried threatens to embarrass his successor, Mnangagwa, and deepen divisions in the ruling Zanu PF party.
Ms Mutsvangwa did not say where Mr Mugabe will be buried, saying more updates will be provided "as more information on the programme trickles in".
The government on Monday dispatched a delegation led by Vice President Kembo Mohadi and also comprising family members to help with the repatriation of former President Mugabe's body.
But some of Mugabe's relatives - who share his bitterness at the way former allies, including Mnangagwa, conspired to topple him - want him buried in his home village in Kutama, 85 kilometres from the capital.
Mugabe had dominated Zimbabwean politics for nearly four decades since independence in 1980 until he was removed by his own army in a November 2017 coup.
The Zimbabwean government said in a memo sent to embassies that it planned to hold a state funeral for Mugabe in the National Sports Stadium on Saturday, with a burial ceremony on Sunday, but it did not say where the burial would be.