Shinji Ikari as Talion

Venom as Celebrimbor

Sheev Palpatine as Shelob

Star Butterfly as Eltariel

Discord as Sauron

Harbinger as the Witch-King

Starvin' Marvin as Baranor

B1 Battle Droids as the Nazgul

Heavy as Bruz

Deadpool as the orcs (yes, including Ratbag and Zog the Eternal)

Fluttershy as Carnan

Shao Kahn as "Ranger"

Mini-Me as Gollum

Twilight Sparkle as Idril

Spy as Castamir

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Touche.