I bet the Celebration Europe will be better than the US one. It just figures. Like in 2005 when they showed all 6 movies in London...they'ed never do that in the US. In fact there's a lot of people who'd like to see the OT in theaters but Lucasfilm won't allow it. Sure it was a special thing they did in London for when ep III came out, but it never happened in the US even though people would have loved it.
Also, Gencon did an awful job at the other Celebrations. Lucasfilm continues to use them to run these things. I may go, but not expect anything. Just go at least knowing the fans are cool, but the rest will blow. It's a good reason for all the fans to come together who actually appreciate the movies. The rest is just a money-grubbing free for all.