Acclaimed animation studio CloverWorks could well be handling the animated sequences in the upcoming Persona 6. The art, that is currently being removed online by SEGA or an external company, seems to use colours and production markings that closely match CloverWorks work. CloverWorks previously worked on the Persona 5 anime adaptation, so it would make sense for Atlus to use them again on the new game, which could be unveiled as soon as this week.
Evidence: The colors used in the leaked materials clearly match those that Clover Works typically uses, and this is even more convincing if these materials were leaked from a Chinese animation production company that specializes in outsourcing work.