Gwenevere

Gwenevere is an upcoming live-action series produced by TBD
Plot
A teenage girl named Gwen accidentally ends up in medieval times and mistaken for the opportunistic traitor Guinevere who has to learn to fight and battle the evils of Mordred 
Cast
Evanna Lynch as Gwen Martins-a teenager who is mistaken for Guinevere
TBD as Arthur Pendragon-
TBD as Merlin
TBD as The Fisher King
TBD as Constantine Smith
Phillipa Soo as Guinevere/Morgana le Fey/The King Slayer - the actual queen and traitor who is thought to be dead but is actually alive and working with Mordred, claiming that Arthur has became a monster due to killing her true love and turned herself into a monster-human hybrid to do that.
Timothee Chaltant as Mordred - the bastard son of Lancelot and Guinevere who was believed that Arthur was his father and abandoned him and works with Guinevere, not knowing she is his biological mother.