More on Yoda in the next trailerAin't It Cool News and Aldera.net both had news items regarding the ShoWest convention. The news below (which contains some mega-spoilers), is a combination of the news found at both pages.
At ShoWest, they showed the "Clone War" trailer along with an additional 10 minutes or so of never-before-seen footage. Everything described below may not be in the trailer, as it could have came from the additional footage shown.
There was a scene shown of a meeting between Yoda, Mace Windu, Ki-Adi-Mundi and Palpatine.
There was a scene of Yoda floating around in his little floating chair. They are discussing how powerful Anakin is, and Yoda says something to the effect of "Very powerful he is."
There is a point where Yoda says a quote similar to "Clouded the future is."
The trailer ends with a lot of intense action, and at the very end, Yoda says "Begun, the Clone Wars have."
There also was a short clip (only a couple of seconds long) that showed Yoda (highlight for spoilers)catching blue lightning in his hand, holding it, and blasting it right back. He had an intense look on his face. This scene probably comes from Yoda's battle with Count Dooku(end of spoilers).
If all of this is true (even if only half of it is right), I can't wait!
Can't highlight spoilers? View this page with the spoilers here.