So who is narrating the trailer? Popular opinion has Chris Metzen in the frame trying to sound suspiciously like Thrall.
Unlike previous trailers for The Burning Crusade and Wrath, this one makes us very aware of the on-going fight in Northrend.
Blink and you might miss it. Could this be the sneakiest of peeks at our final destination within Wrath, Icecrown Citadel and Arthas? Wherever this is, it certainly looks cold and icy. Perhaps it's the bit of Azjol-Nerub we've not seen.
The Lich King has been our constant enemy as we've explored Northrend but the trailer suggests we have been too focused on him to see the bigger picture. One thing we know for certain is that the Lich King will be going down in patch 3.3. The question is more how much time will pass before his fall and Deathwing's return.
This is an interesting image as the fire (symbolising Deathwing) is rising from the Maelstrom. However it does confirm that the coming Cataclysm will affect all of Azeroth, including (to a degree) Northrend.
But what does this image mean exactly? Is it significant? Who knows but that won't stop us guessing.
Deathwing's return to Azeroth is going to literally shake the foundations of the world, changing Azeroth for ever more.
By not showing the former Dragon Aspect, Blizzard is building up the anticipation but it's obvious who and what we will be facing.
This image of a tornado tearing through Darkshore suggests a series of 'natural' disasters will besiege the land before Deathwing's return.
Azeroth is now a broken land, a shadow of its former self. Canyons filled with lava have split the landMost of the world will be affected, including (to a degree) Northrend. However there will be a much-asked-for plus side to this disaster.
Nowhere will escape unscathed. Not Kalimdor ...
or the Eastern Kingdoms.
The trailer provides a brief glimpse at how Azeroth will change. Ancient structures will fall, towns will be abandoned and peoples will be displaced.
Notable towns will be destroyed, including Auberdine. Finally, no more running all the way through Darkshore all the way to Astranaar! However reports suggest there will be an Alliance flight point down the coast.
But it's not all doom and gloom. Desolace will be revived. As will parts of Feralas and the Wailing Caverns in the Barrens thanks to the efforts of Naralex the ever-slumbering Druid.
The most important thing about Cataclysm is the essence of WoW, the enmity between the Horde and the Alliance. Here the Night Elves and the Orcs fight for territory, indeed parts of Darkshore and Ashenvale look to include Horde camps.
The Maelstrom remains an important part of Azerothian cartography. Its prominence in the trailer (along with the announcement of the city of Vashj'ir, the destruction of Kezan and the introduction of the Lost Isles suggests we might see more of it as the storyline evolves. Could we end up visiting the remnants of the Goblin islands or even the home of Aszhara in a later patch?
This has to be the best image in all the trailer: a shellshocked female Goblin. The Goblins are refugees from the destroyed isle of Kezan and find themselves washed up on a tropical island.
A map of the Lost Isles features a human camp to the north and an Orc settlement to the south. Why humans are hostile to the Goblins of the Bilgewater Cartel, we don't know. Remember only some of the Cartel's are faction neutral but at least the trailer explains why this little faction ended up as part of the Horde.
The Goblins are the latest playable race to join the Horde.If you're Curious about them and their presence in Azeroth, you can check out our Know Your Lore piece on Goblins for more information.
The Greymane Wall, currently in-game at the southern-most edge of Silverpine Forest, will finally open, inviting players into a new land.
Gilneas has been closed off for a decade and no one knows what has become of its people. The land is enshrouded in mist and fog, hiding a dark secret.
The people of Gilneas might look human, with their Victorian-esque clothing and courtesy, but they have become more beast than man.
They have become Worgen!
The Foresaken are the lore-specific reason why the people of Gilneas are going to join the Alliance. The trailer explains how Foresaken ships are attacking the penninsula. Why we do not know but but its an interesting move on Sylvanas' part.
But all is not lost. The Night Elves, whose Druids are skilled at shapeshifting, offer the Worgen at chance of conquering their lupine-side.
Yes, the Worgen are the new playable Alliance race.
If you're interested in learning more about the Worgen, you might want to check out our Know Your Lore feature.
Flight in Azeroth has been the one oddity in terms of physics and lore. After all, we can fly in Outland and Northrend, why not Azeroth?
The reason is simple, when WoW was built no one ever dreamed we would be able to take to the sky at will. The destruction brought on by the Cataclysm changes all this.
New race and class combinations were discovered before BlizzCon in the patch 3.2.2 files, as well as being hinted at in the comic book. The actual matrix shows the new races, including what Worgen and Goblins will be able to play.
Dungeons and raids are a staple of any expansion. We've got loads of info. on the various instances we can look forwards too, including Uldum, The Firelands and Abyssal Maw.
No idea who this dragon is ... could it be an apparition of Deathwing when he was still the Earth Warder or another one entirely.
All of Azeroth will be changed by Deathwing's return but the Cataclysm will also allow for new zones to be added.
Yes, rather than grinding a whole ten levels, we only have to do it for five!
Because the Azeroth we know and love will no longer exist, it's no surprise that there will be new quests.
Archaeology is the newest secondary profession and is tied to the Path of the Titans.
Classic instances Shadowfang Keep and the Deadmines are the latest instances to be revamped into level 85 heroics but how they fit into the lore remains to be seen. After all, how many times have we killed Arugal now?
PvPers rejoice, the Battlegrounds are changing. Players will be rated so you can prove how uber you are.
Guilds will be changing post-Catalysm with guilds leveling up and earning bonuses like the ability to lesson those hellish repair bills.
Path of the Titans furthers a character's individuality options by allowing them to follow a specific Titan to complement their spec and class.
A peek at Deathwing's chamber perhaps?
Our ultimate foe and former Dragon Aspect, albeit in concept art form. Check out our Know Your Lore piece on Deathwing.
The logo is different to anything we've ever seen before. Dominated by reds and yellows, it summons up thoughts of lava, magma, death and destruction. The familiar orb of Azeroth is fractured and you are left with this feeling of impending doom at the prospect of Deathwing's return.To find out more about what we know about Cataclysm's storyline, click here.Don't forget you can keep taps on all our Cataclysm coverage by clicking here