WWE isn't owned by Comcast but they've been affiliated with NBC for years now, so UNI would be the place. But WWE already has a presence in Orlando and they haven't taken advantage of many crossover opportunities. The UNI soundstages that TNA has used definitely aren't big enough to accommodate...
Remember that while the Halloween party is going on, the days WITHOUT the party are going to be packed, especially the weekends. Every family that wants to spend a day in the park without paying an extra fee will be there, as well as people who just want to see the normal nighttime...
Are people saying this is going to be extremely crowded aware that it's opening in the middle of the week? From what I can tell it's always opened on the weekend so there isn't precedent. I've always heard the F+W is horrible during the weekend because of drunk locals/college kids but it's not...