With the release of the trailer for Book 4 (finally), I decided it would be fun to break it down, just to see what could possibly be going on. Lets get going:
0:00 - 0:15: Short recap of the end of Book 3, only in black and white. Go watch Venom of the Red Lotus again if you don't remember.
0:15 - 0:20: Three years later... (Sounds interesting)
0:20 - 0:25: A girl from seen from behind cutting off a large chunk of her hair. I can only assume this is Korra, given her new design.
0:25 - 0:45: A logo of the Earth Kingdom appears, the circle with the square in the middle made in what looks to be metal. Book 4: Balance appears over it before fading into another shot saying The Final Season.
0:45 - 0:50: Korra eyes shooting wide open. No further context. Next, it shows Opal and Kai wearing Hiccup-style squirrel-suits, which appear to have replaced the glider as means of transportation for an airbender. Following shot if Kuvira, shooting bits of metal with an evil look on her face. (Big shock, she's going to be a villain) Korra throws a punch of something, but we don't see what. Next, two Hulkbuster armors are boxing each other. How can this not be awesome?
0:50 - 0:55: Korra blocks a rock being thrown at her in some sort of arena, there is a large crowd in the background. Next, a skybison (Oogi?) crash-lands in what appears to be the Foggy Swamp. The beast is all tangled up in vines, indicating the return of plantbending. On his back are Jinora, Ikki and Meelo. Kuvira doing more stuff with an evil look on her face. Also in the swamp, we see a flashback of Korra. Look closely, she has the chain wrapped around her arm like she did in the Book 3 Finale.
0:55 - 1:00: The real Korra waterbending in the swamp. (Maybe at her own hallucination?) Somewhere else, Bolin jumps out of the way of a bolt of lightning and a Hulkbuster, over a pool of lava. (Presumably made by him.) Next, Suyin bows her head with a look of dissappointment on her face. Wei and Wing are standing next to her. Next, we see a fleet of Metal Clan Airships landing in front of what looks to be an army of Hulkbusters. (Again, how can that not be awesome?)
1:00 - 1:05: Bolin launches himself off a cliff with earthbending. Korra is being drowned in what looks to be more mercury. Opal, wearing her squirrel-suit, jumps off a sky bison in mid-air.
1:05 - 1:10: Hulkbusters struggeling with a headwind. (Mock Tony Stark voice: Amateurs.) A door opens up in a room lit by crystals, with Korra getting out of an elevator. Back in Republic City, she uses earthbending to create a fissure. Kuvira standing in front of her henchmen, Hulkbusters and a flag with the log of the Metal Clan.
1:10 - 1:15: Korra firebending. A guy with a duel bladed sword swinging on a rope high up in the air. Next, Jinora also uses a squirrel-suit in Republic City between the vines. Korra stuggles with holding something back. Asami is still the designated driver, with Mako riding shotgun while Korra jumps out.
1:15 - 1:20: Korra climbs a tree with vines, but they snap. Asami fights a guy on the roof of a train, and seems to be winning. Korra turns around with a worried look on her face. A flamethrower mounted on a Hulkbuster. (This just keeps getting better.)
1:20 - 1:25: Lavabending! Korra deflecting... sticks? Kuvira fighting a firebender. A guy jumps out of a suit of armor right before it's crushed and electrified by another one. (Looks like the same guy Asami fought.) Kuvira doing more evil stuff. Korra metalbends the roof of a truck or a train open.
1:25 - 1:30: Mako still got the moves. Kuvira fighting an airbender. Korra breaks down a wall of an overgrown building. She and Mako walk in. Bolin rolls out of the way of an attack and earthbends back.
1:30 - 1:35: Another sky bison, with Jinora, Ikki and Meelo enjoying their squirrel-suit in front of the beast. Another hallucination of Book 3 Finale Korra.
1:35 - 1:40: Korra walks up to one of the spirit forest, hard to tell which one. Next, she walks through a thick brush of vines.
1:40 - 1:45: Korra sitting in her wheelchair in the Southern Water Tribe compound, indicated by the windows. Probably early in the season. (Maybe first episode?) Next, we see her fighting in the swamp with a bruise on her left eye.
1:45 - 1:50: Korra sitting on an elevated treeroot. Kuvira with yet another evil look on her face, but this time there is only one Hulkbuster behind her, but an army of regular soldiers. Also, a lot of banners from the Metal Clan. Opal looks dissappointed in a large, cheering crowd.
1:50 - 1:55: From l-r: Zuko, his daughter the Fire Lord (Indicated by her robe and crown) Raiko and Tenzin. Korra gets ready to fight, standing in front of an army of Kuvira's soldiers. (Anyone else getting Matrix 3 déja vus?) An unknown sky bison with unknown passengers over an unknown mountainrange. Looks pretty though. Katara healing Korra in the pool.
1:55 - 2:00: Looks to be Korra kneeling down in the middle of the Si Wong Desert. Kuvira assumes a fighting stance. By the look on her face, she is winning this fight. Korra in the elevator room again, can't see what she's doing. Zhu Li in a Hulkbuster. (That is it, there is no way that is not going to be more awesome than Aang vs. Ozai.) Mako and Korra see large doors open up, guarded by White Lotus sentries.
2:00 - 2:05: Lava! Varrick doing... something. Kai flying away in his squirrel-suit from a Zaofu jeep. Korra flying through the spirit world.
2:05 - 2:13: Legend of Korra, 3 October 2014.
2:13 - end: One word: Toph!
Like I said, there are few ways this is not going to be awesome. It looks like there is going to be a stronger focus on the skills Team Avatar picked up in Book 3, which is pretty cool. We know Hiroshi will be back, maybe he made the Hulkbuster. Most of the characters have been redesigned, which makes perfect sense. The only thing that worries me is Korra in front of all thos soldiers. I really hope it's not going to be like the Matrix Revolutions, but who knows. Maybe Suyin will even be evil this time around. Unlikely, I know, but still, it could happen. But none of these things match up to ZHU LI IN A HULKBUSTER!