Celebrating the 10th anniversary of Hatsune Miku, SEGA have recently confirmed plans to release new add-on content for Hatsune Miku: Project Diva Future Tone to mark this occasion. This update is expected to include a new song titled Ghost Rule (Music & Lyrics by DECO*27) and a new module to complement it.
The downloadable content is not currently available, with availability, pricing and other details expected to be announced at a later date.
You can read my review of Hatsune Miku: Project Diva Future Tone HERE.