Oh yeah, there was an interview with Tomoya Ohtani (composer) regarding Sonic Forces.
https://sonicjpnews.tumblr.com/post/159954167641/20170425-tomoya-ohtanis-sound-column
Key points:
-Work on the game's main theme started rather early relative to the game's planned release window (February 23rd 2016 was when work on the theme and soundtrack in general started). It's almost finished and is just being tweaked to perfection right now.
-What we have heard of it so far is only a shortened version of it.
-The theme will be used differently to other main themes of other Sonic games. It will be used in a "very important scene" in the game. The ending piano phrase will also be used alone in another important part of the game.
-Takashi Iizuka wanted a song that sounded "serious, dramatic, and cool".