5. King Arthur
This character and those within the legend, myth, and proposed historical connections, have been in literature, rhyme, and song since the 9th century or before. We’ve seen Hollywood go to this well many times, including 1981’s Excalibur and of course Monty Python’s The Holy Grail.
Hollywood recently tried to resurrect this IP with the 2017 box-office bomb King Arthur: Legend of the Sword. Other projects are currently in development as well, so this is a property that should be pursued with caution. But if you can find an original take on the le
gend of King Arthur, have at it.