I just want to say that I'm really happy with this.
A couple of questions come to mind, like the aforementioned "stores and conventions". Hopefully these are able to be ordered for home play. Though, it sounds like the adventures are GenCon are all part of the Expeditions campaign. Which means, at first, there will only be 2 adventures available. If they come out slowly, it might only be worth running them at stores or conventions.
Though, there are some hints that you could actually run the entirety of Tyranny of Dragons as a Expeditions adventure too. Interesting.