Mostly:

My enthusiasm for the Dark Knight movie has waned over the months since I requested to host it. There's only so long even a good movie remains interesting. Then, the game set-up... there would be Batman and the Joker, of course. But there weren't going to be enough other interesting roles... it would have mostly been about those two roles, and everyone else would have been murder fodder. And then there was game balancing... if either of those two major roles died early, what would the fate of the game be?

I would have to fiddle with the game set-up, and I just haven't had much time to do so since Resident Evil started. There's at least a month or two remaining in my Resident Evil game before I could handle hosting another game. There are some ideas, and some details with the game which give it redeeming value, which I'd rather not discuss in case I decide to go ahead with it. If I did, it would be purely based on player's interest.

Hahaha, you could make a Village People game! Six of the players are the group members, one is a murderer trying to slaughter them all for their crimes against ear drums!
Day one, everyone role claims and they lynch the odd (oddest?) man out.