Blizz said theyre going all out with the Dracthyr in a similar way that Pandaren were the next step up above the other races until they were updated. Implying that old races are going to get more customization, and body types are presumably one of those options. I'm asssuming theyre only going to do simple scaling like the Dracthyr got, but obviously cooler stuff like hunched troll women and hell, even skeletal undead are actual possibilities now.
But what body type would you be most excited about? Alpha-styled skinny Blood Elves? Orc women that look like a proper Hulk? Thicc Draenei women? Skinny humans? Fat goblins?