Masters of the Universe Guardians of Grayskull Game Trademark Filing

Since the Masters of the Universe Origins and ThunderCats crossover line was teased at Mattel’s panel at San Diego Comic Con 2024, we’ve been trying to dig up as much dirt as we could on the line. Since the tease, we, received early information about the Wave 1 and Wave 2 figure assortments and the first official images of Lion-O, Cheetara, Battlle Cat-Man, and Skell-Ra have been revealed. As you know, we keep track of Mattel’s trademark renewals and filings as it relates to the Masters of the Universe and like to clues all over the internet and one of the places we look on a regular basis might have revealed the name of the new MOTU Origins ThunderCats crossover line. Although the filing relates to a new game Mattel might be developing, the name “MOTU Guardians of Grayskull”would fit the new MOTU ThunderCats crossover line quite nicely! The MOTU TMNT crossover line was called Turtles of Grayskull and we doubt they name the line something like the Kitty Cats of Grayskull or the Cats of Grayskull. Could it be the new name of the line? Possibly but, at the least, it looks like a cool game is in development.

Guardians References in ThunderCats

As the Sorceress is the Guardian of the Castle Grayskull, the Guardian of the Book of Omens is a mystical being that resides in an alternate dimension that is located within the Book of Omens. This sentient spirit has the appearance of an enlarged Eye of Thundera. The Guardian has immeasurable knowledge about everything relating to the ThunderCats. He will however, share that knowledge only with whoever has the Key of Thundera.

MOTU Origins ThunderCats Wave 1 Official Images

Back in December 2024, we got information from an anonymous source regarding waves 1 and 2 of the new MOTU Origins ThunderCats Crossover line! Flash forward to today as we now have official images of the first wave of MOTU Origins ThunderCats Crossover figures, that include, Skell-Ra, Lion-O, Cheetara, and Battle-Cat Man. Published on the Toy Book, we get our first look at these figures and they are a fantastic hybrid of both Masters of the Universe and ThunderCats properties. Look for the figures to hit retailers starting in April 2025. Huge thanks to Toy Habits Crew member Rob2023 for the heads up!

Skell-Ra

Evil awakens with the Skell-Ra Action Figure ($29.99). This is such a cool idea where you get two figures in one! The collaboration of two iconic 80s brands, Masters of the Universe and ThunderCats, yields an action figure of the Ever-Living Evil of Eternia, Skell-Ra! He comes with 2 swappable heads, a reversible purple / red cape, and swappable harness and skirt armor pieces, so he can evolve from Skell-Ra into Mumm-Ra. The Sword of Plun-darr completes the double-edged picture.

You can switch between Skeletor and Mumm-Ra with the figure’s Sword of Plundarr weapon, a reversible cape, swappable heads, and swappable harness and skirt armor pieces. 

A hi res close up of Skell-Ra’s face shows you what an incredible job Mattel did with these sculpts! Skeletor looks super cool with his red eyes and skeleton jaw! Also the face sculpt for Mumm-Ra is so classic looking!

Cheetara

Cheetara, the fastest feline in the universe comes with her traditional look as well as Eternian-style armor. Cheetara is designed at Origins 5.5-inch scale, with 16 points of articulation, deluxe detail and modular body parts. She has her signature 2 battle staffs as an accessory and comes with 2 interchangeable hair looks, armor and two lower leg looks.

Taking a closer hi-res look at Cheetara’s face sculpt, you can see all the detail and how they captured her 80’s flowing cheetah mane!

Lion-O

Lion-O, the Lord of the ThunderCats is re-interpreted in Eternian style with a Sword of Omens. Lion-O is designed at Origins 5.5-inch scale, with 16 points of articulation, deluxe details and modular body parts. He comes with 2 interchangeable hair looks, swappable armor and harness, removable face armor, shoulder armor and claw shield, 2 different belts and a Sword of Omens accessory.

Next, taking a closer hi-res look at Lion-O’s face sculpt, you can see all the detail and how they captured his classic Lion’s mane and that stunning painted eye details. I love that huge ThunderCats logo on his chest armor!

Battle Cat-Man

Battle Cat, the most powerful cat in the universe, is re-interpreted as human warrior Battle Cat-Man with ThunderCats style helmet, harness, bracers and 2 claw accessories. He’s designed at Origins 5.5-inch scale, with 16 points of articulation and deluxe detail and modular body parts

Finally, taking a closer hi-res look at Battle Cat Man’s face sculpt, you can see all the incredible detail on his tiger’s fur on his cheeks, and that amazing paint apps for his eyes! Again love that ThunderCats logo on the chest armor!

ThunderCats / MOTU Crossover Waves 1 and 2

At the end of Mattel’s epic panel at San Diego Comic Con 2024, the MOTU team teased the next crossover line! The ThunderCats will be the next MOTU Origins mashup and we are so excited for this! According to an anonymous source, we now know what Waves 1 & 2 will consist of. Set to be released sometime in 2025, Wave 1 will consists of … ready for it?! Wave 1 will consist of Lion-O, Cheetara and……. drum roll. Thunder Battlecat! Yes you heard us right, Thunder Battlecat! You might be wondering what a Thunder Battlecat will be, we explore this in the article below. Wave 2 consist of He-Man, Panthro and Tygra! So with the first 2 waves, we will have our core 4 ThunderCats!