Largo Descent (Loki x Nebula)

Loki and Nebula, both outcasts with their own agendas. After the fall of the Mad Titan Thonos and the infinity stones, rumor of a new power emerges, one that can either build an empire or tear it to the ground. The Heart of a dead celestial.
Loki, wanting to take his fate in his own hands, follows the rumor to Knowhere. Nebula, who would rather die than see another tyrant on her father's throne, seeks out the Heart to.
Taking place after Infinity War and End Game, what if Loki never died?
What if Nebula went off on her own after the death of her sister?
And what if, in seeking the heart, two rogues find their own?