You guys know what's filler? Night elves. Damn, I was playing Warcraft 1 and Warcraft 2, don't see no night elves there. Anything to do with night elves is just filler. Warcraft 3 had night elves? That game was filler. WoW has night elves? Filler. TBC focused on Illidan, a NIGHT ELF?!?!? Filler. Damn, Arthas? Lich King? Those weren't in Warcraft 1 and 2! WotLK is ALL FILLER.
If it ain't orcs vs. humans, it's FILLER. Actually, you know what? If a character wasn't in Warcraft 1, it's a filler character. Even if he IS human or orc, if he's not in the original 1994 release of Warcraft 1, he's filler.