World of Warcraft vs Lord of the Rings

Connection:

Both are famous and powerful warlords that wearing armors & helmets

Both wield massive weapons and magical artifacts (Frostmourne and the One Ring respectively) and have command over an element (Fire for Sauron, Ice for Lich King)

Both hail from some of the most recognizable fantasy series

Both are also royalty figures who fell from grace, and basically came back to life by using a power that corrupts anyone who wields it. As well as being the most unchanged ruthless warlords in all of fantasy