by Mike Krumboltz Nothing's a sure thing, except death, taxes, and maybe Pixar. For 15 years, Pixar has been turning out critically acclaimed films, without a stinker to speak of. This weekend, the studio that brought audiences " The Incredibles ," " Finding Nemo ," and " Up " takes the wrapping off the highly anticipated " Toy Story 3 ." How does the series' third film's darker tone sit with the critics? Let's take a look.