The Secretary of the Pontifical Commission “Ecclesia Dei” said that (with some added emphases and comments).
Note the references to doctrinal questions.
C & W: Recently there was an acceleration of relationships, why?
Pozzo:I would not speak of an acceleration, but by a patient process of rapprochement. The Vatican is not demanding, insisting on ultimatums, instead we jointly planned some steps to reach full reconciliation. Since the stages were agreed upon, the way is easier to tread. [NB] We are still interested in clarifying some doctrinal and canonical questions. It is very important to promote a climate of mutual knowledge and understanding. In this respect, much progress has been made. [Doctrinal questions remain.]
C & W: What has changed in the attitude of the Vatican since the beginning of the pontificate?
Pozzo: Several new perspectives were integrated. 2009 to 2012 was primarily a theological debate in the foreground. There were doctrinal difficulties which hindered the canonical recognition of the Fraternity. We know, however, that life is more than doctrine. For through the theological discussion in the past three years we have come to know the desire and understand the reality of the Fraternity. [Interesting.]
[…]C & W: Bergoglio knew the Fraternity from Argentina.How crucial is this personal contact for the Pope?
Pozzo: This is certainly an important element. When he was still Archbishop of Buenos Aires, Pope Francis had contacts with the Fraternity. He saw how much effort they put in evangelization and in charitable work. The Fraternity does not, as is often claimed, only value the traditional liturgy, but also has substantive work.
C & W: Francis always stressed the pastoral aspect. Is this also the key to an understanding with the SSPX?
Pozzo: Pastoral and dogmatic theology are inseparable. The style and concrete willingness of Pope Francis to help the unity between the people not only to think but also to learn. Of course, some gestures are important. He has allowed the Priests of the SSPX to hear confessions of the faithful, he has received the Superior General of the Fraternity, Monsignor Bernard Fellay in private audience. The rapprochement and resumption of talks was all made possible by the [lifting of the] excommunication by Benedict XVI.
C & W: Why is a Personal Prelature appropriate for the SSPX?
Pozzo: That seems to be the appropriate canonical form. [NB] Monsignor Fellay has accepted the proposal, even if in the coming months details remain to be clarified. Only Opus Dei currently enjoys this canonical structure, which is a big vote of confidence for the SSPX. [HOWEVER…] It is clear that the solution of the canonical form requires the solution of the doctrinal questions.
So, it seems that IF the doctrinal questions can be worked out, THEN the SSPX could get a Personal Prelature.