While Warne was named coach of the men's side, Lisa Keightley was appointed coach of the women's side.
McDonald this year became the first coach to secure an Australian domestic treble.
The ECB confirmed that a televised player draft for The Hundred would be held on October 20, ahead of the inaugural competition, starting in July 2020.
Critics have bemoaned the 'dumbing down' of the game, given plans to ditch traditional overs, and questioned the need for a new format given the global popularity of Twenty20.
The Hundred, which is slated to be launched in July-August 2020, will see eight-teams vying for the top honours.
ECB are planning on a 100-ball, inter-city, 5-balls-an-over tournament, starting 2020.
The men's trial matches will be played at Trent Bridge, while the women's counterparts, at Loughborough.