The association of Notre-Dame de Chrétienté states that the bishop of Chartres, Msgr. Philippe Christory, has confirmed that the final mass of the pilgrimage will take place in the cathedral. Moreover, he intends to preach at this mass. This is after “rumors” – and a very public discussion – about intervention by the Vatican to prohibit this mass in the cathedral. See:
“Communiqué Notre Dame de Chrétienté” (in French) Le Forum Catholique (3/9/2025)
“No prohibition of the old Mass on the Traditionalist Pilgrimage after all” (in German), katholisch.de (3/10/2025)
Apparently there still will be no mass in Notre Dame de Paris at the start of the pilgrimage. And the many issues raised by the Vatican potentially intervening in such a pilgrimage remain unaddressed.