They share Mugabe's bitterness at the way former allies including Mnangagwa conspired to topple him and want him buried in his home village.
Earlier, Emmerson Mnangagwa, who succeeded Mugabe as president, said he had appealed to the family to set aside any bitterness.
At the airport Wednesday night, Mnangagwa paid tribute to his former ally, calling him an "icon of pan-Africanism" and "the man who created our nation", Sky News reported.
The ongoing uncertainty of where Mugabe, who died last week at the age of 95, will be buried has overshadowed the arrangements for Zimbabweans to pay their respects to the former guerrilla leader at several historic sites. Grace and other family members still resent his ouster, apparently resulting in their refusal to go along with state burial plans.
It has always been taken for granted that Mugabe would be buried at Heroes' Acre. "We need him to go to Heroes Acre", another mourner, Prisca Mutandi, said as the helicopter carrying Mugabe's coffin landed outside the stadium.
Asked by ZimLive if Leo Mugabe was no longer the family spokesman, Zhuwao said: "Leo speaks for the (traditional) chiefs and the whole extended family". "President Mugabe did not die in Zimbabwe because of Mnangagwa".
Crocodile tears ... President Mnangagwa seen with Robert Mugabe's widow, Grace, first lady Auxillia Mnangagwa and defence minister Oppah Muchinguri at One Commando barracks on Wednesday10th September 1979: The Constitutional Conference on the future of Zimbabwe-Rhodesia, attended by Leaders of the Patriotic Front Robert Mugabe (left) and Joshua Nkomo at Lancaster House, London. He hoisted the new Zimbabwe flag and lit the independence flame on April 18, 1980 - bringing hope for a new era after a long insurgency.
Mugabe died on a medical trip to Singapore, where he had been travelling regularly for treatment. "Nothing will change", said Mnangagwa, adding that his government will respect the family's wishes.
The ruling Zanu-PF party announced that Mugabe's remains would be interred at a hilltop monument outside Harare on Sunday, after a ceremony at the nearby national stadium on Saturday, where dozens of prominent African leaders would be present. It will be shown Thursday and Friday at Rufaro Stadium in Harare's poor Mbare neighbourhood.
"In politics we have had many differences but we are here to reflect on his contribution". It is only fair and necessary to see that we unite to see that he is given a decent burial and a peaceful send off.
However on Wednesday Leo Mugabe told The Associated Press on Wednesday that relations are good between the family and Mnangagwa.
Mugabe presided over an economy wrecked by hyperinflation, shortages and deeply entrenched corruption, and a raging political rivalry between the country's two largest political parties, Zanu-PF and the opposition MDC.