Okay, so I'm going to tax your memories to see if anybody knows why there was a film crew set up near the Fantasmic viewing area outside of PoTC on the 30th of January. I was there with two friends that day and one of them just asked me if I ever found out what was going on - I had to tell her I forgot!
Anyway, it was raining on and off and they decided to bag it for the day in the early afternoon. We asked a couple of CMs what they were trying to film, but no one would fess up to what was going on.
My guess is that they came back to try again a day or two later, but alas, we had to make the 900 mile trip back home the next day, and weren't able to follow up on our sleuthing.