Update (2018-09-26): Atlus has officially uploaded the opening for Catherine: Full Body.
During the Tokyo Game Show 2018 Catherine: Full Body “Complete Reveal Premiere” stage show, Atlus revealed the full opening sequence for the game.
The opening features a remix of “YO,” the opening theme for the original Catherine, with the same hip-hop artist L-VOKAL as the singer. The arrangement of the song is by IZENE, the up-and-coming music group. Female vocals have been added to the song, to give it a cooler and sexier tone.
Additionally, the beginning of the stage show played a clean sample of the theme Rin plays on the piano:
Catherine: Full Body will release for PS4 and PS Vita in Japan on February 14, 2019, and in 2019 in the West.