As for being the first animated series about protecting the environment, I'll have to disagree.
There was another show that also premiered in 1990 and that I loved, Widget, The World Watcher. Along with Denver, the Last Dinosaur, these were the two cartoon series I couldn't miss as a child.
I really hope this movie gets made. I liked that actors performance in John Carter, all in all it was a great movie that just wasn't promoted the way it deserved.
I always wanted to watch Captain Planet as a Live Action show, let's see what happens. Kids these days need to worry about these kinds of things. Saving endangered species, stopping global warming and respecting one another, instead of struggling to become rich and famous, just because.