A warcraft 4 would be so sweet. Sucks that WoW makes another Warcraft strategy game improbably.
Also, I get your point of having other arcs they could do or having other people we could slay, but Arthas was such a huge character in WC3, and considering that there are lesser beings to slay before him, it feels really weird to be going straight for Arthas.
Oh hey, are locks still fucking over powered? I love how the devs favor them.