I'm a little surprised that no one has mentioned this yet, but hopefully this is where Funimation clarifies the "Dragon Ball Season 1" situation one way or the other. It's pretty much a given that the release is legit, but I think that people who attend Anime Expo are going to want answers (with the One Piece streaming thing, now being "secondary", IMO). Why did FUNi lie about the Wal-Mart listing being false (the Anime Next rep not knowing about it isn't an excuse)? What kind of deal have they worked out with Lion's Gate, if any? Will the release retain its original full frame video? Will there be an updated "Dragon Box" release that will include the first movie? You know, questions like that.
Once all that's done, then maybe we can get an update on the One Piece situation.
At any rate, Funimation will have to answer these questions and more; if not at AX, then eventually. Otherwise, they're going to start getting endless questions from fans about it.
Other than that, while I won't be able to go of course, I'm sure it will be a great AX.