In regards to WALL-E, it’s pacing and backstory is perhaps more grown up and complex than the story itself…which really is rather simple, at least at first glance. I never once found WALL-E difficult to follow; rather, it made me think instead. Inception on the other hand was a mindscrew, and took an awful lot of attention to grasp, which of course is great or terrible depending on the kind of viewer you are .
And thinking about it, every Pixar movie has themes that can be considered as grown up. Even the more “childish” ones like Cars and A Bug’s Life. Let’s not forget that scene in ABL where Hopper beats the **** out of Flik; it’s a distressing scene to watch when you’ve grown so attached to the character. Standing up for your rights, as well as realising your imperfections like Flik does, are fairly mature themes. Cars too, the backstory of the town becoming defunct, and the echoing of the celeb lifestyle that Lighting so wishes to follow. And when Lightning is asked to bring friends to his party, he realises he has none. Because every Pixar film also covers loneliness in some shape or form.
More obviously, we have Bob Parr’s minor midlife crisis, and his family who are stuck between normality and superiority. “Normal? What do you know about normal!?”, Violet says early on, and that line stands out because it reflects the mundaness of a society who seemingly strives for equality and sameness to the extent where everything is dumbed down. Again, a similar theme is touched upon in Ratatouille.
And then theres abadonment (Toy Story series), losing a loved one (Finding Nemo, UP), dystophia (WALL-E)…these are all adult themes. Every Pixar theme has them, and to an extent, that is part of their appeal to a broad audience