Into the inferno

What happens when an angel falls? Are they damned to the depths of hell where they reside and remain as demons or do they simply become fallen angels free to roam whatever plain they desire? What happens when Satan has kidnaps the Archangel Gabriel? What happens when there's such a threat that Michael the Archangel contacts the Batfamily for help?
The answer to the questions is simple. It's circumstantial whether or not an angel becomes a demon or fallen angel. If an angel is cast out of heaven by another angel under the sin of treachery, fraud, betrayal or blasphemy then they become a fallen angel. If an angel chooses to join Satan or is cast out by God they become demons. If a powerful angel were to be forced to fall by the hand of a fallen angel, nearly impossible but possible, then they would reign down on the world in a powerful furry. Michael needs help retrieving his brother before he falls. The Batfamily goes through the nine circles of hell. The world plummeted into darkness as a great deal of danger emerges. A raging war between angels and demons risks the armageddon . The angels Lilith and Michael fight the evil Ezekiel who proves hard to kill especially with the collateral damage at stake. Who will win this war?
Inspiration came from Dante's Inferno and the creepypasta "The day I lost my faith"