The interview with Cardinal Hoyos was posted on FR a couple of weeks ago.
Don't get your hopes up. This seems like wishful thinking on Hoyos' part. He talks about studying the situation further. The term "juridical guarantee" is not any kind of official term, it's a speculative concept on the Cardinal's part. Hoyos uses the future tense and presents the whole idea as being in the realm of possibility only. It's all very iffy, if you ask me.
Meanwhile, even more significant was his response to the direct question of how the Pope views traditionalists. He gave what I consider a non-answer, bringing up the old argument about the motu proprio--as if that somehow signified the Pope's favor. It certainly does not. The Indult was a ploy to divide the SSPX and nothing more. Had the Pope wanted the Indult to truly succeed, he would not have acted so harshly to punish it a few years ago--on a trifling matter.
The opposite is more likely true, if you ask me. When the Pope granted the Indult for the FSSP, he said he did so so that the priests might continue to follow "their spiritual and liturgical traditions." --As if those traditions were any different from his own! The truth is, JPII has little regard for the movement and shows this in myriad ways. Had he wanted to encourage its growth, he would have issued the kind of praise he routinely lavishes on other groups and persons. He knows how to encourage and give praise when he wants to. But his attention is only grudging at best. When he met with indult priests and seminarians not many years ago, he admonished them rather than praised them for their successes.
This interview is a gross disappointment. It reenforces my sense that there are two factions in Rome vying for dominance--the one to which Hoyos subscribes which looks with favor on the traditionalist movement in general and which is using the media to encourage the movement, and the modernists who remain in fierce opposition to anything from the past. The Pope, in my opinion, belongs with the latter group, or, at the very least, has decided to remain neutral and to allow them to spread their falsehoods without interference.