There is a redesign to the undead race. You can now choose from 4 models, which are different races. Blizzard is apparently pushing out a new character creation tool, which includes options for side races.There appears to only be a new class added. I saw like 10+ leaks today made by different people claiming that we have new undead options. Are you physically at gamescom? This sounds very plausible, and gives the playerbase the option for subraces.
I didn't find the right solution from the Internet.