I read somewhere that Disney is very close to breaking Sony's record (set last year) of highest grossing studio for a year. so even if HM doesn't put up Finding Nemo numbers it will still be very valuable for Disney.
I think I like the second HM poster the best. It looks spookier...
I don't think this will necessarily be just a kids film - yes, it will be a family oriented comedy, but since I am a fan of the Haunted Mansion ride I think I will want to see the movie regardless of the reviews. I heard it was written by the same guy who wrote Elf which apparently is very funny (haven't seen Elf yet but definitely plan to).