Blogged because while I wrote it as part of another comment I think it's a sentiment that deserves to stand on its own:
Source: What do you want to see in the Lego Batman Movie?
On another note—I love the theme of the movie we've heard about from Phil Lord and Chris Miller: Can Batman be happy? It's a question worth asking, in an era where DC and Warner Bros. think that audiences still only want gritty, angst-ridden, "realistic" superheroes in movies, or with high-profile marriages between DC comics characters being aborted because "Superheroes shouldn't have happy personal lives." If Lego is what it takes to get DC Comics out of its recent funk, I think it'll be a good thing for the comics market and the superhero genre in general.