'Tis not a troll, however, we do want to host it on Hallowe'en so we may enjoy the festivities with cosplay and contests.
We're planning to have a raffle with various prizes (including MB figurines, gift cards, etc.) and people who attend in costume will receive a raffle ticket.
We've yet to clear the details with the arcade owner (such as if we can actually hold it there - I think we will be able to, he wants to host tournaments - what system it will be on [i.e. AA or AC], and, most importantly, the tournament format), but we will, rest assured.