After watching the trailer a million more times, I have some observations.
As Collinwood is ablaze, the portrait of Barnabas is in distinct danger of burning up. (The portrait above the mantle appears to be that of Barnabas.) Even if Collinwood goes up, I would hope that several important pieces would be saved, namely portraits, music boxes, etc.
Barnabas, Roger, Julia, and Vicki are absent from the scene of the family watching the fire.
Barnabas saves David from the crashing Disco ball.
Mrs. Johnson is going to be a brilliant character. And Julia appears to be quite fun as well.
I still can't say that I like the trailer, but I am more curious than ever to learn about my favorite characters. And I really want the tone of the movie to be much different from the comedic things we see here. There's a lot of drama spliced in between. I hope it overrides the other.