I play Horde and hate our lack of choices, cows and belfs...yuk! Which races do you think Blizz will open up to Pallys, either from existing races or highly talked about (possible) future races.
Keep in mind that Blizz has clearly stated, many times, that lore will not interfere with gameplay (i.e. if we want to do it, we will). And while I could see them taking lore restrictions into consideration when chosing the next pally race, I dont think it would 100% rule out any race.