Welcome back!
Dragoncon is a world unto itself. 80,000 people geekgasm. Nerdigras. Takes over 5 20+ story hotels. As in, they are sold out in ten minutes in October 2016 for the September 2017 con. Since it's a fan-run con (as opposed to San Diego Comic-Con which is industry-run) it has a much more intimate flavor. We don't get the shiny new exclusive movie premieres, but you can randomly have breakfast with Odo from DS9 (we did... twice!) or run into Delenn from Bab5 (literally, as in almost knocked her over). This year we've got some good guests signing on.
Jim Butcher, Nathan Fillion, Eric Flint, Karen Gillan, Laurell K Hamilton, Michael Hogan, Sherrilyn Kenyon, Katherin Kurtz, Stan Lee, Elizabeth Moon, Jody Lynn Nye, Billie Piper, Matt Smith, Janny Wurts, Don Maitz, Jane Yolen and Timothy Zahn. There are more, but these are the most recognizable names (so far).