It's long been a running joke that Marvel hasn't addressed Tiamut, the enormous Celestial protruding from the Indian Ocean first seen in Eternals.
That ends now – all thanks to a new Captain America: Brave New World teaser that not only answers one of Marvel fans' biggest post-Avengers: Endgame questions, but also introduces a material that could have major implications in an X-Men-filled future in the MCU.
