The main title theme's very first musical note has the same pitch, length and spacing to the second note as the main title theme for Star Trek: The Original Series (1966). From there, it varies until almost the end where a small portion of Alexander Courage's original theme is duplicated.
With Michael being the adoptive sister of Spock, the series have many flashbacks to their childhood and upbringing on Vulcan. Spock's Vulcan half-brother, Sybok, does not appear nor is mention during these scenes. In Star Trek V: The Final Frontier (1989), Spock says that he and Sybok grew up together. However, since it's never stated when Sybok joined Sarek's home - only that he did so following his mother's death - or when he was exiled from the family, it's not impossible Sybok moved in after Burnham, and left before she graduated (the two extremes of the flashbacks). Also, since Sybok was never mentioned before Star Trek V, it seems reasonable the family never spoke of him again after his estrangement.
The serif-font legends and subtitles in the "broadcast" episodes are absent from the DVD versions, where they are replaced with the standard DVD subtitles.