Having looked into some dungeon crawls lately (Descent and upcoming Castle Ravenloft) I wondered what if WotC gave Heroscape a full dungeon crawl / campaign treatment?
Battle for the Underdark had a taste of it with the ongoing scenarios along with an upcoming Dungeon adventure at Gencon.
The current battle system is perfect as it is. We've seen the addition of treasure carried by characters. How about the ability to level up characters? (eg like blue tokens to place on character card and up the defense over time).
The ability to play a campaign like Descent Road to Legends in a Heroscape environment I find very exciting. An addition of cards or other components could easily reinvent the game for those looking for added depth, narrative and gameplay length.