Getting ready to leave. Not much is happening until around noon or so. A few opening ceremonies or track debuts and such happen this morning, but they are usually sparsely attended. Most of the dealers areas don't open until then either. But the place will be THICK with people, including thousands trying to get their tickets. Costumes will abound, and pictures galore will be taken.
I'm betting that there will be a lot of AVENGER costumes this year. I'm also thinking that Skyrim costumes will be prevalant. Beyond that, I expect to be constantly surprised. I've seen everything from complete body paint jobs to full power armor. We'll see.
The one thing I've learned in the previous 14 Dragon*Con visits is to be READY with the camera at all times, and to be as flexible as possible. Schedules are changing all the time, and you never know when a session will be packed to capacity or beyond.
I've always got my eye out for COH costumes -- though I've yet to see one in person. I know someone came as a Long bow a few years back. There will be dozens in HERO costume (They tried for a world-record gathering last year or the year before...)), so you never know.