i remember when i was younger, at around 5 or 6, there were no "sets" where all you did was build the models and play with them. we were given a big tub of legos and we could build whatever we want.
at least my little brother still has some creativity. he buys a set, build it, then destroys it and makes a tank or fighter jet and has a big war with his other tanks and jets.

but a movie? i can kinda see where they are getting it from. because 95% of the new legos are sets (judging by what my little bro brings home) and not tubs of lego bricks, they could easily make a story out of the newer stuff.