While, for a lot of people, the convention may seem to end at Gen Con, that's really not the case. There's still shows after that. One of them is the NOVA Open, held in Arlington, VA. Many different gaming companies will be there holding events. CoolMiniOrNot is one of them. They've posted up their events schedule, so you can be prepared.
For Dark Age, there's going to be demos running. There'll also be holding one of the first March To Immortality tourneys. Win this and you get a ticket to Gen Con 2016 to try and win the Immortals tourney where you can then make a mini for the game.
Then there's Wrath of Kings. Like above, they'll be running demos for the game during the show. They've also got their Treachery at Tymour storyline event. Each day, the winner's faction will set up the situation for the following. So get in there and get your faction the win so you can help change the game for the upcoming days.