Thursday, April 23, 2026

'TMNT: The Last Ronin' Prequel 'Training Day' Gets Gorgeous New Cover Art | First Look

Some of the biggest names in the industry are contributing to the newest Last Ronin comic.

Teenage Mutant Ninja Turtles: The Last Ronin

IDW's hit Teenage Mutant Ninja Turtles: The Last Ronin saga continues to grow bigger. We already know that Kevin Eastman and his collaborators are hard at work on the third act of the Last Ronin trilogy, but there's also a new prequel spinoff in the works called TMNT: The Last Ronin - Training Day. Set in a 24-hour period during the original Last Ronin series, one shot Training Day will reveal how Michelangelo whipped young Casey Marie Jones into fighting shape before their showdown with Oroku Hiroto.

IGN has debuted three new covers for TMNT: The Last Ronin - Training Day #1. Check them out, along with the previously revealed covers, in the gallery below:

'TMNT: The Last Ronin - Training Day' Cover | Art by the Escorza Bros.
Art by the Escorza Bros. (Image Credit: IDW/Nickelodeon)

'TMNT: The Last Ronin - Training Day' Cover | Art by Kevin Eastman
Art by Kevin Eastman. (Image Credit: IDW/Nickelodeon)

'TMNT: The Last Ronin - Training Day' Cover | Art by Clayton Crain
Art by Clayton Crain. (Image Credit: IDW/Nickelodeon)

'TMNT: The Last Ronin - Training Day' Cover | Art by Ben Bishop
Art by Ben Bishop. (Image Credit: IDW/Nickelodeon)

'TMNT: The Last Ronin - Training Day' Cover | Art by Jonboy Meyers
Art by Jonboy Meyers. (Image Credit: IDW/Nickelodeon)

'TMNT: The Last Ronin - Training Day' Cover | Art by Kevin Eastman
Art by Kevin Eastman. (Image Credit: IDW/Nickelodeon)

Training Day reunites the original Last Ronin creative team, including writers Kevin Eastman and Tom Waltz, artists the Escorza brothers and Ben Bishop, and colorist Luis Antonio Delgado. Here's the official logline for the issue:

The training mission you didn’t see!

Michelangelo only has a short time to get young Casey Marie Jones prepared for battle against Oroku Hiroto. How can the Last Ronin distill a lifetime’s worth of training and knowledge into one day? Read the epic tale of action and legacy too big to fit into the pages of the original book, written and drawn by the original Last Ronin team!

This makes Training Day the fourth book in the Last Ronin saga, following the original 2020 miniseries, 2022's TMNT: The Last Ronin - The Lost Years, and 2023's TMNT: The Last Ronin II - Re-Evolution. As mentioned, Eastman and Waltz confirmed to IGN that another direct sequel is in the works, though we don't know the release date yet.

“This is going to be very personal for our heroes, whereas, it's business for the powers that be right now. And I also think, a character that I really look forward to exploring more is Jiro, because he has had a relationship with Casey. And maybe that was more genuine right now than it appears to be,” Waltz told IGN. “And so that's a dynamic I look forward to exploring. But I also think, when it comes to the family aspect, it's time for Casey Marie to step up and be that family leader. And we've thrown elements of the Hamato Clan into the mix too. So there's cool things happening behind the scenes that I think are going to make for some really, really exciting drama in the third volume.”

TMNT: The Last Ronin - Training Day #1 will be released on Wednesday, July 15, 2026. You can preorder a copy at your local comic shop.

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Additional source: League of Comic Geeks.

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