Okay, y’all. Here’s how I do my patented heget fusion of the Batman family and mythos into The Silmarillion (no, you do not get actual OCs and a story series out of this).
The setting is the Isle of Balar during the last days of the First Age, and our narrator, Leber, is this older man -or elf, I don’t know- who had studied under Dírhavel, someone who tried to memorize the ballads and heroic epics but was better at creating silly new ones and illustrating pictures of the heroes and stories for his audience using pieces of chalk against the stone. He usually has an audience of children wherever he goes on the crowded island, because he can keep them entertained while their parents or guardians (so many are orphans) work. The majority are mortal children, but there are a few elven children. They ask him for stories about a hero, a new one, of a place that isn’t Arda, isn’t this war against Morgoth. He crafts whimsical stories for them, but sometimes they want ones with darkness and sadness, the tragic hero who fights evil anyways even if he will die in the end. So Leber describes this great city, one with many levels and layers and beautiful lamps and shrouded in a near perpetual twilight, because he has the stories of Menegroth memorized- but his great city has been ransacked by wars and time, occupied by cruel men, and isn’t as lovely anymore, because his audience are the refugee children of a destroyed and dying continent, and he places this city on an island instead of underground or nestled in the mountains because for most of his audience an island is the only location that they understand or know. And it is always rainy or overcast on this island city.
Now there are enemies in this city, because his audience cannot fathom a place that doesn’t have enemies, mean and cruel but not orcs, never Balrogs. Sometimes shape-shifting tricksters like Gorthaur the Cruel, but Leber has enough inspiration from Easterling overlords like Lorgan and the outlaw bands – something dangerous but mortal enough to defeat. Flocks of enemy crows and a werewolf or two, but no dragons. Our city is on an island and dragons can’t swim out to islands, he reassures his young audience of Balar.
Now who is his hero, who fights like our outlaw heroes Beren, Túrin, and Tuor against the bad men who have conquered and are despoiling this island metropolis? Leber describes his as a prince, of course, who whose parents were murdered when he was young, leaving him to be raised by a faithful family retainer. Leber’s stories don’t say if he was mortal or elven. But this prince has a sword and many treasures from his parents, is wise and clever and strong, but haunted by the survivor’s guilt. And this story and its hero needs more magic, something to entertain his audience, so Leber thinks back to his historical lays and remembers Lúthien’s bat-skin disguise and her hair-cloak of invisibly. He combines the two cloaks and adds Túrin’s habit of hiding his identity, and his hero is now the Bat-man, who can disappear into the night and fly on bat-wings with his true identity hidden. A lone hero for the first few story-times, pictures scribbled on the ground, but one day Leber adds a second warrior, a younger boy to be his hero’s fighting companion and adopted son. (If he thinks of Annael taking in Tuor- or especially Thingol taking in Túrin – and like Túrin and Tuor this younger hero will fight with his mentor and run way, only to fall into danger, so be it. Leber is copying the stories he knows.) So the cast grows- a Haladim warrior-maid, then several more, a love interest or two met in the night, more squires and young warrior companion-sons and like Beren one of them dies but is brought back from Mandos. He adds an Ent, more elves, more magic, but above all this the hero clad in black.