Last summer, Guardians of the Galaxy Vol. 2 first introduced the character of Mantis (played by Pom Klementieff) into the MCU. When she says that she was raised alone on Ego's planet, many of us figured that was the extent of her origin story, which was wildy altered from the comics. As it turns out, however, there is more to the story of the empathic, socially-stunted alien, who serves as the Living Planet's ward and walking bottle of NyQuil.
Taking to Instagram today, writer/director James Gunn addressed and confirmed an Easter egg, which shows Ego (Kurt Russell) hooking up with a female member of Mantis's species in one of those strange dioramas he shows Peter while on his planet. This particular display was meant to drive home the point that while he tried to father a child with the Celestial gene on thousands of planets, none of his breeding efforts were successful and all of them died when he tried to use them as batteries for his plan to take over the universe.
"MANY of you have been writing me about a discovered Easter egg in #GotG Vol. 2, where Ego apparently seems to have been with a female of Mantis’ species. Yes, I can confirm this is correct. However, you don’t necessarily need to infer anything else from this information. Whatever the case, good find!!" wrote Gunn, basically shooting down the logical inference that Ego could be Mantis's father.
Rather, he simply saved her when she was orphaned as a kid and raised her, because she'd probably be dead if she was one of his offpsring. Another things that also gets shot down is the hunt for the elusive Guardians of the Galaxy Easter egg that Gunn has eluded to many times in the past. "(No, it’s not THE #EasterEgg)," he said at the end of the post.
If you'll recall, in January, Gunn did let a fan know that there was something in Vol. 2 that fans had yet to find. But Ego making out with a Mantis alien doesn't seem to be it. So there's an even bigger hidden treasure still hiding in the first movie, and Gunn is remaining tight-lipped on that front, except for stating that people have come close. He's so confident that fans won't locate it, that he once offered someone $100,000 to prove him wrong. As recently as March, people were still discovering Easter eggs in Vol. 1, but the one to top them all has yet to be located.
Gunn later elaborated on how they created Ego's alien orgy diorama: They used real actors to create the "sculptures," with Jennifer Sharp serving as the model for the female member of Mantis's species. He shared a behind-the-scenes picture of Sharp posing with Russell in front of a blue screen with motion capture dots on their faces.