Update 2 - Wed 15th Jan, 2020 05:00 GMT: Nintendo's Japanese social media accounts and YouTube channel have now confirmed this as well. Above is a trailer showcasing the many costumes and features in the game.

Here's the costume list, courtesy of Gematsu:

New Costumes: “Rebellious Joker” (from Persona 5) for Itsuki Aoi, “Reuben Schwester” (from Fire Emblem: Three Houses) for Mamori Minamoto, “Cross Bravery” from (Etrian Odyssey Nexus) for Eleonora Yumizuru, and “Demonica Replica” (from Shin Megami Tensei: Strange Journey) for Yashiro Tsurugi.

Update - Tue 14th Jan, 2020 04:45 GMT: An actual in-game screenshot of Itsuki's Joker costume has now surfaced online (thanks, Nintendo Everything). It's also been confirmed other characters in the game will get costumes as well.

Original Story - Sat 11th Jan, 2020 05:55 GMT: Next week sees the release of Tokyo Mirage Sessions #FE Encore. If you didn't already know, the game is a slightly enhanced version of the original Wii U title from 2016. The latest iteration comes with new songs, a new story, and even new costumes.

Ahead of its worldwide release next week, something interesting has reportedly been spotted on the back of the Switch box art (via Amazon Japan). If the title wasn't enough of a hint, it's supposedly Joker's outfit from Persona 5. Here are some grainy images of the Japanese box art, courtesy of Twitter user @theprinceofiris:

Yep, after appearing in Super Smash Bros. Ultimate, it looks like Joker will be making an encore in this enhanced Atlus title as a collaboration outfit for Itsuki. Next month he'll also be appearing in Persona 5 Scramble: The Phantom Strikers.

At this point, it seems like Atlus is willing to give Switch owners everything related to Joker and Persona but the main games.

How do you feel about Joker popping up in yet another Switch exclusive? Leave a comment down below.

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[source youtu.be, via amazon.co.jp]