Warning! Spoilers ahead for Eternals: Celestia #1
In Marvel Comics' new Eternals: Celestia, the Eternal interpreter Ajak calls out the Avengers for living in a Celestial's corpse. Known as Avengers Mountain based in the North Pole, the current headquarters of Earth's Mightiest Heroes is indeed within the deceased body of the Progenitor, the first Celestial who came to Earth and brought life to the world. Being the speaker for the Celestials themselves, Ajak is naturally quite angered by the Avengers' actions despite their claims that the Celestials gifted them the Progenitor's body.
In Eternals: Celestia #1 from writer Kieron Gillen and artist Kei Zama, Ajak is struggling. While her role amongst the Eternals has typically been to translate the words of the Celestials, her job has become a lot harder now that the Celestials have nothing to say. Their final message to Ajak was that they had no further use for the Eternals, leaving the Celestial speaker at a loss for what she should do next, seeing as how her gods have quite literally abandoned her. However, she eventually decides to make a pilgrimage to the North Pole to witness the Progenitor's body that was left in the care of the Avengers.
That being said, the Eternal soon to be played by Salma Hayek does not like what she finds in the Arctic. Witnessing the Avengers living within the Progenitor's body, Ajak views their actions as a massive desecration of the gods she still loves despite their rejection. While Ghost Rider tries to explain that there were permitted by the Celestials themselves in Jason Aaron's Avengers #8, this only angers Ajak more, seeing as how it meant that the Celestials deemed to talk to Robbie Reyes rather than their own speaker amongst the Eternals. Unable to reconcile what's she been told, it seems as though Ajak has just become a major threat to Earth's Mightiest Heroes.
While the Eternals' speedster Makkari managed to remove Ajak before she killed Ghost Rider, it's pretty clear that the former speaker for the Celestials isn't done with the Avengers. While the issue featured flashbacks that saw her fighting the ancient Avengers before seeing their value as a secondary line of defense for the Earth, Ajak now believes that she made a mistake by letting the Avengers live. Clearly, that mindset doesn't bode well, and it wouldn't be hard to imagine Ajak instigating a war between the Eternals and Avengers in the near future.
All in all, even though the Avengers' were gifted the Progenitor's remains by the Celestials, it's still kinda weird that they've essentially been living inside a dead body at the North Pole since 2018. Whether or not the Avengers' base is a mistake, the ramifications it could have on their relationship with the Eternals is fairly significant. The Eternals' presence in the Marvel Universe is only going to get stronger with the coming Eternals film, so here's hoping the Avengers can find a way to smooth things over with Ajak before any kind of escalation occurs.