I thought about this for a while now and I thought it would be interesting to have a crossover alliance with difference characters with the characters from the Harry Potter series in which the characters I chose for the alliance for the Sith along with the Death Eaters are the characters from the movies UnderWorld in which those movies are absolutely incredible. In the story The Sith were allies of both the death eaters as well as the vampires and the lycans until war started and they were all deceived by the Ministry of Magic as well as Dumbledore himself.

Vampires:

1.) Viktor (Leader of the Vampires)

2.) Sonja(Viktor's Daughter)

3.) Marcus

4.) Amelia

5.) Kraven

6.) Selene

7.) Vampire Elders

Lycans:

1.) Lucian(Leader of the Lycans)

2.) Raze

3.) Michael Corvin(Lycan/Vampire Hybrid)

5.) William(Lycan/Marcus's Twin Brother Deceased Killed by Wizards)

6.) Lycans

Death Eaters:

1.) Lord Voldemort

2.) Lucias Malfoy

3.) Draco Malfoy

4.) Severus Snape

5.) Bellatrix

6.) Peter Pettigrew

7.) Burty Crouch Jr

8.) Fenrir Greyback(Werewolf)

In the story basically all the vampires and werewolves are wizards and witches in which I will be doing showing them in the chapters in which Ren Palpatine will unite them to take down their enemy who have rob them of what they have lost and avenge those who have fallen and treated differently towards others.