The game needs an expansion with more characters and more cards for the most common decks.
I'm also hoping something will come out sooner or later.
I think FFG is really missing the boat on this one. A character pack and additional cards would be pretty easy expansions to make. They already have tons of hero sculpts from Descent they could use.
I'd also like to see what they could do in the way of building upon the game too.
I'm not privy to any sales figures, but maybe DQ sales aren't worth the effort of expansions. Too bad if that's true.