How do we know he won’t change this, as it was from the prior Pope? Just asking, not suggesting I know the answer.
He won't.
This is just like what happened before Paul VI issued Humanae Vitae (that reaffirmed the Church's prohibition on artificial birth control).
March 28, 2003, Joseph Card. Ratzinger
Moral conscience requires that, in every occasion, Christians give witness to the whole moral truth, which is contradicted both by approval of homosexual acts and unjust discrimination against homosexual persons. Therefore, discreet and prudent actions can be effective; these might involve: unmasking the way in which such tolerance might be exploited or used in the service of ideology; stating clearly the immoral nature of these unions; reminding the government of the need to contain the phenomenon within certain limits so as to safeguard public morality and, above all, to avoid exposing young people to erroneous ideas about sexuality and marriage that would deprive them of their necessary defences and contribute to the spread of the phenomenon. Those who would move from tolerance to the legitimization of specific rights for cohabiting homosexual persons need to be reminded that the approval or legalization of evil is something far different from the toleration of evil.
In those situations where homosexual unions have been legally recognized or have been given the legal status and rights belonging to marriage, clear and emphatic opposition is a duty. One must refrain from any kind of formal cooperation in the enactment or application of such gravely unjust laws and, as far as possible, from material cooperation on the level of their application. In this area, everyone can exercise the right to conscientious objection.
June 3, 2003, Joseph Card. Ratzinger
This is the measure against which Pope Francis' recent statements must be judged.
If he changes any of this, duck and cover, because we're in big trouble.