Well, seeing as the races are the exact same as Oblivion and Morrowind's 10 races, I really don't see them revealing anything concerning them.
Unless they want to go really in depth with the Nords and their religion.
They're going to be the same races, yes, but I'm hoping they're more diverse and not so cookie-cutter in relation to one-another.
I want Argonians who look like Argonians (What happened to you Argonians??). Dunmer to look like ... Dunmer, not prissy little school girl sounding fairy elves.