I figured it out!
I know exactly how the campaigns will be formed in Wc4! This is from my personal opinion.
1- Ignore WoW storyline completely. Arthas can not be pwned by pesky adventurers.
2- New Race: Blood Elven Alliance or something like that. This will equal Blood Elves + Naga.
The Campaign
Ok, the campaign, like the one for Wc3, will be one campaign for each race. Which means 5 campaigns. (remember, this is including the blood elven alliance one.) Btw this is in no chronological order. Im just making this up as i go along
(Btw, keep in mind that most likely Blizzard will add new main characters and heroes for each race, so u dont play as the same old heroes all the time. Also, to set up the game for an expansion, at the end of every campaign, there will be a level where that race begins to set up colonies along northrend. Huzzah for King Arthas!
Humans: Old Hatreds
This campaign will be in the perspective of Jaina Proudmoore, and her trying to lead in the city of Theramore. This campaign will be much like the Cycle of Hatred book by Keith DeCanDido, where she will be trying to prevent her city from waging war/fighting with racism with the orcs while trying to undermine the Burning Blade cult that lies withen her city.
Undead: Rise of the Forsaken
Thats right, we will not be playing as King Arthas yet. (Maybe Expansion?) but we will be facing Scarlet Crusaders, Arthas's minions that were left in Loerderon (I cant spell, BITE ME), and the final remnants of what is left of Loaderon's broken kingdom. This campaign will basically be Sylvanas and Vamithras's troubles to form their kingdom from the capital city of Loerderon.
Orcs: I honestly do not know. Some sudgestions for me please? I mean, we are allready doing Cycle of Hatred for Humans.. shall we include parts of that for orcs as well? Hmm...
Night Elves: The Healing of the Land
I guess this campaign will be mostly about restoring the night elves' land that was greatly corrupted. The main enemies here will be like huge clans of satyrs, corrupted furbolgs, and remaining demons I guess.
Blood Elven Alliance: The Outlandish Empire
This will be about Kael and that uhh snake lady.. forgot her name sadly. I have horrible memory. Anyways, it will be about them taking over all of outland. Btw, since im thinking that Blizz wont use WoW's story, then Illidan got owned by arthas and is now dead. So Kael and snake woman, knowing that both the Alliance and the Horde would be against them, retreated back to Outland to form their own empire there.
That is personally what I think. I would hope that they would add new units for the currently existing races. Possibly a new hero as well. The only problem I see is that if they make Blood Elven Alliance.. then would they still leave the spell breakers? What if they replace the Spell Breaker with like a Scarlet Crusader unit or something. Nvm.. just remembered that scarlet crusade ended up getting attacked by alliance as well since they would slaughter "innocents" for thinking they were undead. Tell me what you guys think of this. Btw this is how my face looks right now, since i just drank 5 cans of coke and I am also listening to system of a down music in a tiny dark room.