Arthas was strong paladin, but he failed and became the thing he was fighting against. Tempted by the evil forces he succumbed. I think that Anduin won't do that.
I know that's Arthas from "alternate Azeroth", but would like to see Anduin becoming the one that Arthas was meant to be - strong paladin and true king of Azeroth(not the planet, the continent from Wc3 aka Eastern Kingdoms).