Cars 2 gets alot of criticism that it doesn't deserve. Yeah, Doc is not here, and it is not explained in this movie. Doc's voice actor passed away in 2007, one year after the original movie's release. Anyway, i loved this movie when i was smaller, but it came with bad timing. I had forgot about Doc. The video game for this movie was one the first video games of my own. Other than Doc not being here, the movie did a relatively good job in keeping my attention as a kid, I still think its a cool movie to this day, even after the more recent release of Cars 3.