By Sega have revealed the main theme for Hatsune Miku and Future Stars: Project Mirai: it’s “YumeYume,” by Deco*27. This is the official video for the song itself:
Since YumeYume will be the game’s main theme, it will also be featured as the opening video. While we don’t have that yet, here are a couple of stills taken from it:
As reported earlier in the week, “Servant of Evil” (below) is another one of the songs in the game. Servant of Evil is one of a series of five tracks by artist, Mothy, which collectively tell a story. Two songs from this series — Daughter of Evil and Servant of Evil — have been revealed for Project Mirai so far. Both songs have been given append versions for the game.
We also have new costume reveals to go with the newly-revealed tracks, as well as some pertaining to previously-revealed songs:
YumeYume:
Servant of Evil:
Piano*Girl:
LOL: 
Matryoshka:
Happy Synthesizer:
