Someone happened to notice a slight similarity between the Wrath of the Lich King cover and the cover for the Battle for Middle Earth expansion. Hilariously enough The Wrath of the Lich King and The Rise of the Witch-King sound alarmingly similar. Also the armor itself is very much alike, then there is also the blue background. The Middle Earth expansion came out in 2006, so it’s possible that the cover art was unintentionally inspired by it. However, Arthas’ armor was based off of Warcraft III which came out in 2003. It’s likely just one big coincidence, but funny either way.