While there hasn't been much interaction between them, text makes clear that Varian hates Thrall/the Orcs very, very deeply:

Dialogue taken from the Alliance version of the Battle of the Undercity. Note his reaction upon hearing Thrall.

Or an Old God set up the kidnapping and rescueing in order to promote war between the Alliance and the Horde. Seems right the kind of manipulating thing they'd do. It was the first I thought about when reading about the 'Varian pulls a missing diplomat on Thrall' thing.

Not that there won't be war without it though. With the Alliance losing Southshore and Ashenvale it looks like Varian was right. The Horde has been left unchecked for too long.

Also, we haven't seen much of Eastern Kingdoms and how it was affected by the Cataclysm - most of the screenshots we've seen are from northern Kalimdor: The Barrens, Desolace, Ashenvale, Darkshore, etc. The only thing we've seen in Eastern Kingdoms is the Greymane wall being shattered.

What about the rest of the planet?

South Kalimdor - Feralas, Tanaris, Un'goro, Silithus (Especcially after AQ)
Eastern Kingdoms - Plaguelands (Esp after the Scourge defeat), Quel'thelas area (Esp after Sunwell), Human/Dwarf kingdoms, etc. We know the gnomes will retake Gnomeregan, but how will the continent be affected by the Cataclysm geographically speaking, and by past event? I fully expect the bridge connecting southern and northern Eastern Kingdoms to be shattered.

The problem is that there's a disconnect between the in-game, and say the comic where Varian & Thrall meet at the summit, and he has his doubts about the Orcs, and then afterwards when both sides think the other attacked each otherhe has a much more...level headed I want to say? Opinion of Thrall, and speaks about Garrosh as the more foul type of Orc.

Cho'gall in Grim Batol would make sense. I'm not sure about a Temple of Earth raid as where Deathwing is confronted, but who knows.

Keep in mind that the 4 announced raids, I guess, only share 14 bosses between them. So it's only about as much content as Naxx, although obviously building things (mostly) from scratch will require more work.

I can easily see there being additional Abyssal Maw / Uldum / Temple of Earth raids in the content cycle, but if that's the case I don't understand why Blizzard wouldn't announce them as being planned already. But yeah, there has to be more than just these four in the works for Cataclysm.

There were also some hints dropped that we might see another CoA raid in Cataclysm. It'd be about time... I'm not sure if I'd put my money on it being blue, green, or bronze however. Probably not red.

tbh I'm starting to wonder whether the original plot of WotLK was changed so that the war between Alliance and Horde could be continued/expanded in Cataclysm. It seemed like the "three act" structure of WotLK's story isn't going to happen - where's the event ending Act II? My guess is that there was originally going to be a reconciliation between the two factions so that they could fight Arthas together, but... this turned out to be not desirable in the long run. So we're going to be fighting the opposite faction right up to Arthas' doorstop. It's not like this ruins the plot or anything, just undermines all the "you must fight together or die together" stuff that was being foreshadowed.

Yeah, but that does beg the question though. If Grim Batol is slated for somebody else, just where are we going to fight Deathwing?

That's an interesting topic I'm looking forward to discuss over the next few months.

I'm kind of interested in what connections Deathwing has made with the Old Gods. Living in Deepholm and receiving aid there, in addition to being allied with the Twilight Hammer, implies that he holds command over what we've always known to be forces loyal to the Old Gods.

Are the elementals and the TH going with Deathwing because he's ultimately a product of Old God meddling? Did he simply dominate and subjugate them? Is Deathwing himself now under more direct control of the Old Gods rather than simply being driven mad by them (this seems like the most likely reason the TH and elementals would work with him, but the least likely fate of someone like Deathwing)?

I can't wait to get into the expansion and start learning the truth behind some of this.

It may also be likely that it's just Deathwing and Therazane that get along (for whatever reason), with the other elemental planes only gaining entry due to Deepholm being connected.

All we know is that his base is Deepholm, that doesn't have to mean that the Elemental Lords like him being there.

I'm curious as to what the explanation for Nefarian's return will be, assuming it hasn't already been stated (and I missed it). I wonder if he'll get retconned into not being killed, or somehow he'll have grown his head back.

I'm not the type to get worked up over this sort of thing, I just think it will be rather amusing to set out to kill level 85 Nefarian, while level 60 Nefarian's head is on a pike in Orgrimmar.

Another interesting part was them saying that they have "Big Plans" for Frostmourne. Also that when Lich King is defeated there would be some sort of an in-game cinematic (I am guessing similar to Wrath Gate) that will tie in the whole Northrend story.

It could mean that someone else gets the Frostmourne and becomes the new Lich King.

Also, an easy way to increase the hostility between Alliance and Horde and maybe give Garrosh's approach more credibility would be is Saurfang ends up dying at the hands of an Alliance attack.

But it will be interesting to see how that whole thing plays out. I will also be very surprised if Jaina, Sylvanas don't show up at the end (during the cinematic) when we are getting done with Arthas.

Right, but this is before he holds the Horde responsible for killing a legion of his men along with his very best friend. Do we have any idea whether or not the comic is going to end up covering the wrathgate and the battle for the undercity and all that stuff? It has the potential to flesh out Varian's reactions a lot more.