There is more than one version of the character in the comics, which seems to be true with many heroes. The Crow is usually an undead superpowered vigilante, resurrected by a supernatural bird that serves as a guide to restless souls and allows them to exact their revenge on their murderers. The bird gifts those it re-births with its powers and magic, which is said to be rooted in lost love.
The most memorable version of the Crow was Eric. A gang of criminals murdered him and his fiancé, and Eric was forced to watch them kill her before they killed him. A year after his death, the crow resurrected his restless soul and allowed him to exact his revenge on those that had hurt him and the woman he loved. After Eric succeeded in murdering his victims, his soul was seemingly finally put to rest, but he would later return to help other heroes.
Every Crow’s story is tragic and heartbreaking, and their sole purpose is seeking revenge and murdering those who have wronged them or those they love.
While the response was mostly positive, many agreed that Momoa would be too big to play a hero that is usually one of the scrawnier characters in the comic book world.