It's probably a demonstration of MotW and Mordor later games.
-Kester and her Mordor made 4 fully upgraded Fortresses with catapults around.Also Witch-King of Angmar + 2 Fellbeats + MoS +3 Nazgul harassing the enemy.Classic and Perfect Mordor Turtling. Sounds invicible ?
-Revan has his Rohhirims and his Theoden's GC.Is GC a GG power ? :p