However, on a serious note:
In almost each and every case that Anubis appears in a given movie/game/comic/book/cartoon thing, he either represents death (as he should
) or is otherwise harmful. And almost every single time whatever he is involved in, fails miserably.
I'd wager this reflects our fear of death, of 'the end', with each victory over what Anubis represents, we symbolically beat death, for a short while we can imagine to ourselves that since the death god failed, maybe death will fail in our personal case. I supoose that is why he is so omnipresent, because in RL, death is omnipresent -- and at least in fiction we want to see that this thing can be beaten.