Well, it does seem like Abrams, as well as Johnson and Trevorrow, do know who Rey’s parents are, as opposed to the speculations that they were just making it up as they went along.
It’s also possible that it will be revealed in ep. VIII as opposed to IX, as it is going to be someone familiar.
Although I’ll reserve judgment until I’ve actually seen Ep. VIII, I’m at least glad to hear that they’re working so close together, as opposed to each film being a retcon of the previous script. Even though Trevorrow won’t start for another year or so he seem to be well informed about the plots of the future films already.