I guess I don't get why everyone thinks this movie was MADE for kids. It was a documentary. I'm not sure how many kids watch documentaries for fun. And just because it's labeled as "Disney," don't assume it's gonna be problem free. They were also partnered with the BBC and others.
I'm 19 and I still was disturbed to see some of the scenes, but it's a fact of life. It's something those animals deal with every day, and still overcome all odds. That was the main point. Without the 'sad' scenes, there honestly wouldn't have been a plot at all. What fun would it be to watch those elephants make the journey without any problems at all? Not much entertainment in that. In fact, it would be false information. And I'm pretty sure that would defeat the purpose of an informative documentary.
On another note, I too am so excited for Oceans! Though I'm afraid of open water (I can't stand not seeing what's underneath me), I'm still gonna check this movie out.