Will there be a jam theme to build around (even just a suggested theme), or is it being an MV the only guidepost?
MV is the only guidepost!
Oh that's too bad then. I could do that now.
A theme would be pretty cool, even if its optional.
If you would a theme for inspiration, you can just use a theme generator https://letsmakeagame.net/game-jam-theme-generator/