I agree, it's ridiculous. Of course some books have been made from the movies (I know, we got the toy story ones here!), but most kids don't even have the books. It's just lazy parents who can't be bothered to be remotely interested in encouraging their kids. What kind of message is that giving to the kids, when they hear their parents say "it's all nonsense, who cares, just do what you want". Sometimes the schools are ridiculous, but as a parent you should show a positive face to encourage your children.
We are so lucky with internet, there are litterally thousands of ideas, just type their favourite book, and you get so much help. It cost 2 or 3 pounds to come up with a fun costume.
I do love comics, and I regret that they are so difficult to find in England .
My youngest boy went as Billy (jeans dungaree, yellow top, soft toy doggy), from Billy and Buddy, the cartoon (not the movie). I am not against comic at all, it's just sad to see the lack of effort. I like spending an evening talking about that with the kids and preparing. The outfit cost me: nothing. Kid is happy and proud. I spent £2 on his youngest sister, a new tshirt to draw on and accessories. I can't afford to spend more.