A Warcraft 4 is the only way to salvage the setting.
First campaign can be set in Arathor, there you go, you got your Blue Humans and Blue Elves again.
Have them deal with eternal conflicts of the Empire, before an Horde expedition makes landfall at the end of the campaign and kicks off campaign 2.
Then focus on a group of Horde adventurers, dealing Arathor, fighting the hostile natives, give us back our Orcs vs Humans, red vs blue