But, as expected, the clip promises heart, soul and a lot more emotions as Peter Quill and Co. fight to protect the cosmos.

Source: https://www.cbr.com/gotg-vol-3-expand-cosmic-scope-mcu/

It's also notable that Peter Quill claimed that he'd always have a piece of Ego's power with him via the seedling he absorbed.

Source: https://screenrant.com/what-if-season-2-episode-2-ending-explained/

One might even see a parallel between James Gunn and Peter Quill.

Source: https://www.slashfilm.com/1277513/guardians-of-the-galaxy-vol-3-second-credit-scene-chris-pratt-mcu/

Peter Quill leaves behind the Guardians of the Galaxy so that he can return to Earth and make amends with his grandfather, Jason Quill.

Source: https://gamerant.com/who-dies-in-guardians-of-the-galaxy-vol-3/

Peter Quill no longer has the traditional powers of a Celestial that Ego had.

Source: https://www.cbr.com/guardians-of-the-galaxy-3-star-lord-celestial-powers/

The film was a spiral of emotions throughout all of the characters, especially Peter Quill grieving the “death” of Gamora, but she is not actually dead– that part is confusing so we will leave it at that.

Source: https://www.mesapress.com/a-e/movies/2023/05/27/the-end-of-the-guardians-of-the-galaxy/

This Gamora isn't in love with Peter Quill and has no memory of the early adventures of the Guardians.

Source: https://comicbook.com/movies/news/guardians-of-the-galaxy-gamora-death-original-plan-james-gunn/