What would you like to see on the cover?
I'd like to see a 4-person traditional adventuring party (human, dwarf, elf, halfling; of the classes fighter, rogue, cleric, wizard; not necessarily in that order). I'd like them to be discovering something, not fighting something. No action poses, but a sense of wonder as you share their awe as they, say, see a scary door in the lamplight. They should be ordinary looking people in realistic-looking armour/clothing, and they should have backpacks, lanterns, etc. A sense of mystery and foreboding, speaking directly to the exploration side of the game.
Something that gets your imagination going. What's behind that door?
How about you?