Rather than just use kids to blurb-quote your movie when no-one else will, why don't distributors find out which 80-100 movies these young'uns had to have so bad and use the "So good your children will beg you to steal it!" angle.
Because Mamma Mia! was a successful song-show-movie, now Tom Hanks is doing the same for Green Day's concept album American Idiot! Tom, after Apollo 11 and From Earth To Moon, why not Pink Floyd's Dark Side Of The Moon? It screams out for 3-D and IMAX and a million speakers all blasting out! Upside: repeat business from all the fans who can't remember the first viewing except to say it was "awesome".