It gets REALLY old playing hundreds of matches per week in the same dungeon.
I'd gladly pay a reasonable amount of cash or gems to get some backdrop variety (cosmetic only). Seems to me that this could be a pretty decent money-maker.
The new skins wouldn't all have to look like dungeons. I think we're way past suspension of disbelief in DB. There could be holiday-themed skins (ex. Lord Zomm's Tomb for Halloween), event-themed skins (ex. A big outdoor arena available for purchase during a PvP Grand Tourney), character-themed skins (ex. Lily's Glen, Valkin's Mead Hall), etc.
Anyone else have thoughts or suggestions?