Summerized from the 9,000 posts in Code Geass Lelouch of the Rebellion R2 Spoiler Thread, Stage1029 to Stage1037, which are packed with discussion on the premiere.
For the first half, please scroll down a bit or go to my journal.
Sketches in this article are drawn by memory by 2ch folks who went to the premiere. Many thanks to these talented nameless artists for sharing these! :)
Part B
Zero Burai and Sutherland break into the building. Rollo is glad to see the Britannia Army.
But a massacre begins immediately. They kill every civilian, regardless of being Britannian or Eleven. Rollo is astonished.
Zero Burai stands in front of Lelouch and reaches out a hand, but is immediately damaged under Sutherland's attack.
(Some summaries mark it's damaged while shielding Lelouch.)
Lelouch and Rollo flee from the plaza.
They are soon trapped in a warehouse. Lelouch is confused, "is their target me?"
Britannian soldier finds them, and shoots Rollo.
Lelouch shields Rollo. He wasn't hit but loses balance, and falls off.
Rollo reaches out for him, but couldn't hold on to him (that hand slipping scene in trailers).
Rollo screams "niisaaaaaan!!" (Brother!!) as Lelouch falls.
The student council is maintaining the school garden.
Shirley says, "I hope Lulu doesn't get Rollo in trouble." (She calls him Lulu again.)
(This line belongs here, not in the scene Lelouch was chased by Villetta. Sorry for the confusion.)
Lelouch is saved by the safety net in the middle of the staircase.
He calls Rollo, than starts climbing up by himself.
It's really tough. The building crumbles here and there because it's still under construction, and partly because of the raid.
Lelouch says to himself, "I should have the power to protect a little brother at least!"
Back up in the plaza, what meet the eye are piles of dead bodies.
Among them are the boxer brothers, the bunnygirls, and the Black King.
One of the bunnygirls holds a Zero photo in her hand.
Zero Burai shows up again.
C.C. (in her white pilot suit) comes out of the cockpit and reaches out a hand, like the end of Ep15, saying, "I have come for you. I'm the only one who knows the true you."
A soldier shoots her from the back, through her heart.
C.C. falls off Zero Burai, whispering "Lelouch..."
Lelouch catches her, holds her in his arms.
The captain tells Lelouch he is a bait to lure out C.C. and he's always watched.
He opens a notebook and starts reading out loud. It's a log of Lelouch's everyday activities.
What time he gets up. What time he has breakfast with his brother. Every little detail.
The Britannia soldiers starts burning the bodies, shooting every civilian that's still alive, or just burn them altogether in purple flame.
Lelouch shouts, "Stop! They're still alive!" (the line in Ep 25 ending.)
The captain points his pistol at Lelouch, saying, "your job is done."
C.C.'s voice. "Now to break the seal."
Flashback.
Jupiter.
The contract scenes.
The Emperor. Marianne. (No Nunnally!)
Kaminejima.
Sukazu is pointing his pistol at Lelouch, saying, "I won't ask for forgiveness. Lelouch, we are friends, right?"
Lelouch says, "is that your answer?" while bearly catching his breath.
Geass is back on. (Imagine the scene in Ep1.) 

He talks in a low tone, "if being powerless is a sin, does that make power justice?" (from the end of Ep25)
"In the name of Lelouch Vi Britannia, all of you, die!"
The soldiers shoot each other. The captain suicides.
Guren Nishiki and Gekka arrive, kneel down in one knee.
Urabe says, "Sorry to keep you waiting, Zero-sama. Please give us orders!"
(Everyone says this scene is AWESOME!)
The Emperor leaves a dark hall, to meet Gino, Anya, and Suzaku.
Suzaku is on one knee, saying, "Yes, your Majesty. I will not let anyone take this privilege. I will kill Zero!"
Ending
Ending song is sung by Orange Range. People say it's decent. A little too bright.
The drawings were done by CLAMP, filled with the meaningless accessories they love- feathers, wings, cuffs & chain, and shell.
Everyone has wings. Some say everyone is cuffed or chained. But I'm not sure.
They are shown in this order:
1. Lelouch- Posing as usual. With chains on his left wrist.
2. Nunnally and Rollo- Nunnally has white wings, Rollo has one black and one white. Nunnally looks lovely. Rollo is back-to-back with her, looking at her with an uneasy / sorrowful expression.
3. Cornelia and Euphie- Euphie lying in Cornelia's lap. Looks peaceful. Ooh~ and the breasts!
4. Gino and Anya- Look like big bro & lil sis. A cute and peaceful scene.
5. Emperor and V.V.- Emperor standing in the back. V.V. is standing in the front totally naked.
6. Kallen- Much hotter than expected.
7. Suzaku- Looks like he's from Tsubasa Chronicle. Chains on both hands.
8. C.C.- Sitting on a broken shell.
Here are some sketches to give you an idea of how they look.
*warning* V.V. might be NSFW. ;p
Preview
-Suzaku kneels before the Emperor.
-Bunny Kallen wearing a black coat. Some say it's Lelouch's Ashford uniform, some say it's the OotBK uniform.
-Vincent in action.
-Zero's speech, declaring his return.






















(no subject)
THE PEOPLE LIVING IN
Area 11JAPAN ARE SO LUCKY THEY GET THEIR GEASS EARLY *rant*