The Pope has reportedly already written the post-synodal exhortation and has written a motu proprio too. I don't know what is in them. But at the 2001 Fontomgbault Conference, Cardinal Ratzinger said he thought the Holy See should let the Traditional Roman rite coexist with the Novus Ordo to show continuity.
Read the whole interview of Father Joseph Fessio, SJ, to The Wanderer, in Brian Mershon's most recent column.