I'm thinking of getting a RB expansion soon. I had Midnight, but was disappointed that the rules had changed enough that you couldn't mix the basic set of heroes into a Midnight game -- or visa versa.

Is there an expansion where you can easily mix basic heroes within the expansion? As well as use the expansion heroes for a basic game?

Pretty much every other expansion is designed to have interchangeable heroes.

The only big box expansion I have is IoD. The heroes from it and the base set mix just fine, and none of their powers are expansion specific.

Its too bad there are no options for buying more heroes outside of getting the big box expansions.

I kind of hope they release an expansion "Heroes of Terrinoth". There are now 4 Terrinoth games and I think its great that they released stat cards for the other 3 games for the DungeonQuest heroes. I'd be interested in buying a box of mini's and stat cards, tokens etc that would have 12 or so heroes useable for all 4 Terrinoth games.

I second that idea. I have Runewars so a set with heroes I could use with both would be great. Are you listening FFG?