Sadly this is very common on World Book Day. About a quarter of the kids just wear a football kit and have to borrow a football non fiction book from the school library.
Personally I never liked it when I was teaching as it defeats the object of the day, which is supposed to encourage a love of reading and a desire to read books of substance. It is the same for the quarter of kids that show up as superheroes and Disney characters with a Marvel or Frozen annual under their arm. But each to their own I suppose.
We always tried to redress the balance, especially with my eldest who would insist we helped her make the most extravagant costumes.
Here she is as the Empire States Building from James and the Giant Peach, a Golden ticket from Charlie and the Chocolate Factory and Big Ben (she had a poem about Big Ben published when she was 5 in an anthology so took that book in).