Yet panty-shots are still a thing in her games.

The age rating, man!
Sonic Racing: CrossWorlds is rated E for Everyone while Hatsune Miku: Project DIVA series are rated T for Teen.
Sonic Racing: CrossWorlds rating would be rated T for Teen if Miku could show pantyshots and it would limit the sale target audiences.
these "Festivals" in CrossWorld sound a lot like Events from Sonic Speed Sim, but less rewarding.
Well, basically it's just a racing game with "Pimp My Car" element afterall.
There is bound to be some Minecraft fan dedicated to finding or making this a legit seed.
Yes, but it'll take someone who's both fan of Sonic and Minecraft. Well, I guess there's still a lot, but we'll see.