Lyon claimed a 1-0 win in the first leg in France in February thanks to a goal from Lucas Tousart.
The competition was then suspended in March because of the coronavirus crisis and UEFA has yet to announce a concrete plan to resume the 2019-2020 tournament.
However, the Turkish Football Federation (TFF) claimed this week that it was restarting the Super Lig season so it could finish before the UEFA Champions League final, which would be held in Istanbul in August.
Aulas has now claimed the match with Juve at Allianz Stadium will happen in the early part of that month.
"The match against Juventus is confirmed for 7 August [8 August AEST], in Turin and behind closed doors," he told RTL.
The Ligue 1 season was concluded early after French authorities decreed there would be no live sport in the country until at least September.
Paris Saint-Germain was confirmed as champion based on its average points per match, while Lyon finished seventh, outside the European places.
A return to the UEFA Champions League is therefore contingent on Lyon winning this season's competition, but Aulas believes neither it nor PSG will have any chance against teams who have been playing regularly in restarted leagues.
"If the appeals [to have Ligue 1 resumed] are not successful, Lyon and PSG will be sent to be massacred by teams who will have had a preparation that others won't have had," he said.