According to an authoritative source like 'The Times', the negotiations are ongoing between the major European leagues to end the summer mercato session on August 15 starting from next season. The Premier League and LaLiga are the two most engaged in that negotiation process, but also Serie A, Bundesliga and Ligue 1 should follow through. There is still the question mark on countries like Saudi Arabia and Qatar that would not take part of that agreement.
[Sportface via @AroundJuventus]