Okay, I just finally saw this and it looks amazing. Since I'm stuck at work at 10:30 at night, I'm going to do a shot by shot analysis of the new stuff, starting about halfway through. I apologize if this results in any ***SPOILERS***.
1) Anakin has yellow eyes. Did Maul have yellow eyes? The emperor does, and I'm wondering if it's a trait of Sith I'm not aware of.
2) Volcano, and a brief shot later on of an Obi-Wan, Anakin duel by a volcano. I remember reading rumors of a volcano duel years and years ago, which helps scar Anakin thoroughly enough that he requires the Vader armor.
3) Not sure what those creatures are (they might be robots), but the lava world is very reminiscent of a video game version of Kessel that I once saw.
4) That's much more of James Earl Jones' voice than I expected. It's also a very girly position for Vader's hands.
5) The droids in the blockade runner? Another flashback, or something new?
6) Cool Wookies.
7) Several capital ships in a battle over Coruscant, some unidentified but at least one trade federation doughnut. The second fighter to woosh by has very TIE-like wings, like a link between Maul's ship and the eventual TIE design.
8) Anakin and Padme kiss. Does this mean we see him as non-evil in the beginning? Or is she kissing her wayward Sith in a state of denial?
9) There's the TIE-thingy again, this time flying over what are obviously Clone Warrior proto Star Destroyers from episode two. Another trade federation ship in the background. The TIE quite obviously has R2-D2 in a side-car astromech position, so it might be Obi-Wan or a pre-evil Anakin.
10) Mace Windu fighting against someone with a red lightsaber. It's hard to see location, but the wall and spire in teh background imply that he's in the Jedi Council Chamber.
11) Huge wookie army, very cool, walkers and tracked vehicles in the background. They don't appear to be on Kashyyk, though, unless it's some weird part of Kashyyk I'm not aware of, where you can actually see ground with no trees. I think I spelled that name wrong. Not as techy an army as I would have like; where's the bowcasters?
12) This spooky-looking dude reminds me of someon from the cartoons. I should watch them more consistently. The teeth are spooky, but kind of squirrel-ish.
13) A big ship of unkown origin, possibly on Coruscant, possibly grounded. It's burning and the little ships are hosing it down to put it out. That skyline is very Coruscant-y, but it's very far away and I didn't think Coruscant had that much empty space on the surface.
14) Very brief shot of Anakin hacking something, doesn't look quite as evil yet.
15) Padme with Leia-cinnamon-roll hair! Hooray!
16) A space view of the lava planet, with a Naboo ship in the foreground.
17) Aforementioned lavaside duel.
18) More ship battle over Coruscant, very pirate-like the way they're firing back and forth at each other. The one on top is a Clone Warrior proto Star Destroyer, the other is unknown. Trade Federation and all kinds of other ships below.
19) Evil Anakin chokes Obi-Wan with his black-gloved robot hand.
20) A proto X-Wing with six wings, all apparently fixed in place.
21) Obi-Wan still being choked, and Anakin looking remarkably spooky while doing it. He looks almost impassive rather than angry, which is a lot scarier (though it may be a sign that Anakin is under some sort of influence at the time). This scene alone, brief though it may be, convinces me that Hayden Christensen can do evil Anakin really, really well.
22) Inside of a capital ship, looks very similar to the trade federation hangar from episode one. Look very carefully and you can see a fighter escaping in the lower right while the doors close--also very reminiscent of episode one. Weird.
23) This is the coolest shot in the whole trailer: Darth Sidious himself, mouth open and horrible teeth bared, whales on somebody with a dark red lightsaber. Now that would be a fitting death for Mace Windu (and almost has to be--who else is cool enough to be killed in a duel with the emperor, not counting the people we know don't die?).
24) Same capital ship battle over Coruscant, little proto TIE fighter in the foreground dodges a major explosion.
What can I say? This trailer had me from the first note of the soundtrack, and got cooler and cooler from there. Here's hoping.