I was interested in getting everyone's ideas about what they think will be included with the new customizations for each race. I've highlighted what is confirmed as well as some speculation.
Human: New race options so that players can better show the diversity of the real world.
Dwarf: Wildhammers and tattoos
Gnome: Likely more hair options. Possibly Leper Gnomes (I doubt it).
Night Elf: Probably new tattoos. Hopefully new facial hair options for the males.
Orc: Probably new tattoos. Perhaps new clan representations like Dragonmaw. I'm doubting Fel Orc options.
Tauren: Probably new horn options. I'd love to see Taunka options, but I think they're more like an Allied Race. Maybe new tattoos to have a Grimtotem.
Troll: New troll tribes like Sandfury... and tattoos (some of which are like the Blood Trolls from BfA.
Undead: Boneless options and new hairstyles and skin colors. Some are hoping for undead elves, but I think this is less likely.
Draenei: Longer tails and more jewelry and likely more head shapes and tattoos. It won't happen, but I'd love to see Broken options. I vote no to Eredar options, but some people are hopeful.
Blood Elf: Probably will get tattoos to show some ranger-like options. This is opening up a whole can of beans, but possibly High Elf eye color options. They did mention being able to separate eye color when they were talking about customization, although they weren't specifically talking about elves. I know many would prefer this to be an option for Void Elves, but they've literally said that new customizations are only for core races and not Allied Races. The tears will be many no matter what happens here.
Worgen: I imagine they'll add just alot more customization here. Perhaps some facial scaring or something.
Goblin: They will likely have alot more hair, jewelry, and ear options.
Pandaren: Other than just new options, the only big thing I can think of hear is adding tail options for males.