The ambiguity in Johnson’s statements and the moment in question, means that the door is still open for the reveal to be reversed after The Last Jedi.
Yet in The Last Jedi the exact opposite was proven true.
Rian Johson, the director of The Last Jedi, has defended his decision one of the movie’s most controversial reveals.
The Last Jedi takes pains to separate itself for the past and begin a new era for Star Wars, the reveal of Rey’s parentage is yet another step in that (refreshing) direction.