Eternity

This was yet another awesome Easter-Egg that could potentially become much more important within the MCU. When Ego revealed his plan to his son, and tried to convince him to join the cause, Ego touched his forehead. In that moment, Quill’s eyes changed, becoming black with bright dots here and there. It looked as if he held the whole Universe in his eyes.

Apparently, that was exactly what was happening. In that moment, Peter was awestruck and uttered one word: Eternity. This wasn’t the first time Eternity was teased in the MCU; that honor went to Ant-Man. And if Eternity, exists in the MCU as a cosmic entity, we could eventually see Death, as well.

Ego helped Peter catch a glimpse of Eternity using the same trick the Ancient One used on Stephen Strange before his first interdimensional trip. Pretty neat, right?