The trailer made me go from "will wait for the Blu Ray" to "will see in theaters, as long as the reviews are decent", and I don't see many movies in theaters. I am a big fan of the first three movies.
It's interesting that Noah Vosen, Ezra Kramer, and Dr. Hirsch all appear to be in Legacy. I can think of three possibilities that would explain this:
1. They appear in flashbacks
2. Nothing happened to them after the events of the Bourne Ultimatum
3. The movie takes place before Ultimatum (and probably Supremacy, since the movies are set only weeks apart)
#3 seems most likely to me. If those three guys -- particularly Hirsch -- were allowed to keep working in the CIA after Bourne exposed them, it would really diminish the importance of the events in Ultimatum.
Since there were several years between Identity and Supremacy, I'm guessing Legacy takes place in that time period. But that raises other questions, like:
* If Noah Vosen worked to track down Aaron Cross -- whom the trailer implies is more skilled than Bourne -- why did he fail so often when going up against Bourne?
* Why isn't Ward Abbot in the movie?
* Why isn't Nicky Parsons in the movie?
My interest has definitely been piqued.