User blog comment:JKGame/The Joker vs Kuchisake-Onna: Epic Rap Battles of the Universe Halloween Special/@comment-39211960-20191029211726/@comment-35597744-20191029213153

The fact that they’re hints would imply they’re not the actual rappers. They’re meant to help you find out who the real rappers are.

But the next battle has someone from your favorite anime. (I presume it is, at least.)