This is how I think a Silmarillion Trilogy should be like (if someone is ever worthy of doing it)
The Silmarillion: The Tale of Beren and Lúthien
Backstory-Morgoth stealing the Silmarils and the Battle of Sudden Flame
Backstory revealed during actual movie- explanations for Elven Immortality and Human mortality
The Silmarillion: The Children of Húrin
Backstory-The Battle of Unnumbered Tears
Backstory revealed during actual movie- The Oath of Fëanor and the divisions between the Noldor and Sindar
The Silmarillion: The Akallabêth
Backstory-Fall of Gondolin, the War of Wrath, Fate of the Silmarils, Creation of Numenor
Backstory revealed during actual movie- origin of Morgoth and the forging of the rings of power
I know the Fall of Numenor is not part of the Silmarillion, but it was included in the book
The Silmarillion and besides there needs to be a unitied title (similar to the Lord of the Rings) to make it a movie trilogy, since everyone just loves movie trilogies so much
