Turtles of Grayskull

Turtles of Grayskull is an upcoming American comic book limited series written by Tim Seeley, drawn by Freddie Williams II and colored by Andrew Dalhouse. It will be published by Dark Horse Comics on September 25, 2024. The series features a storyline that crosses-over Mattel's Masters of the Universe with Paramount/Nickelodeon's Teenage Mutant Ninja Turtles.

Premise
"When the Teenage Mutant Ninja Turtles came across Krang and Shredder making a deal with some otherworldly 'demon-mage' named Skeletor, things got hella-weird and they ended up in ETERNIA! It turns out, when you mix Ultrom mutagen with demon magic you get a nasty purple poison—and it's brought Eternia to the brink of chaos. So, Leo, Raph, Donnie, and Mikey are teaming up with the Masters of the Universe to kick some blue boney butt. The only problem is...He-Man is missing in action."

- Dark Horse Comics

Publication history
Turtles of Grayskull is a comic book limited series published by Dark Horse Comics, being a crossover event between Masters of the Universe by Mattel and Teenage Mutant Ninja Turtles by Paramount and Nickelodeon.

Writer Tim Seeley said, "As inevitable as a meet up between He-Man and the Turtles has felt, it took some time getting done! And now that it's here, I have a huge pile of newly purchased figures and a bunch of pages for what is one of the most awesome comics I've ever gotten to work on. To say Freddie and I approached this Dark Horse series with some screaming-our-heads-off-style enthusiasm is underselling it a bit. I can't wait until you get to read this."

Artist Freddie E. Williams II added, "He-Man and the Ninja Turtles? Tim and I have been discussing potential plots and ideas for a few years, and he still surprised me with an even cooler (unique) way to connect these worlds, and reconnect and connect again...in this bending world hopping, time-skipping approach. This crossover has a long lineage -- many of us fans have been bashing He-Man and the Ninja Turtles together since we were kids! And I'm honored and thrilled to draw it!"

The publication was preceeded by a planned crossover comic project, titled He-Man/Teenage Mutant Ninja Turtles featuring the IDW versions of the Turtles, which Williams provided illustration sketches for. After a brief initial approval in 2019, the project was abruptly cancelled. In early 2024. a crossover toy line was started as an offshoot of the Origin action figure series, which, following a longstanding tradition with the MOTU franchise, incorporated accompanying minicomics illustrated by Williams.