Gnomes and draenei say "hi". All the gnomes had before WoW was one line in the WC2 (or was it WC3?) manual explaining why they never appeared in that RTS game. The draenei were an even worse asspull than the void elves and their introduction basically retconned Sargeras' backstory.Only one of them lacked seeding.
Also, the idea of blood elves messing with the void is an old one, dating back to High Astromancer Solarian in TBC, a blood elf who could turn into a voidwalker.