Gotta agree with Kristopher. Coming up, we all watched the same toons and read the same comics as our older siblings/parents, etc. None of this diluting the material for the kiddies. Any mainstream comic is, at best, going to be no harder than a soft pg-13; no profanity, nudity, very little bloodshed. I don't get the need to have G-rated versions of the same characters. That just seems like resources that could be used for the regular titles/productions.
I kindof think some mainstream comics push the nudity point--you don't have to show private parts to be nudity; perfectly placed smoke and stuff is still nudity. Or we have the ever favorite thong shots. (Of course, that stuff did show up in the 70s too, but art process is better and panels tend to be larger.)
That said, comics of the good old days of 60s through the 80s saw comics that were totally enjoyed by 10 year olds and 30 year olds. The stories were interesting enough for adults but understandable to 10 year olds. And what now takes 6 months to tell used to be told within 28 pages. As a kid in the 70s, I didn't read the "kiddie" versions.
Personally I think division is part of the downfall of coimcs. Writers are writing for an older audience, and spreading out the story among 6 parts. Then they write these dumbed down versions for kids. 5 and 6 year olds might read that, but they need books for the tween/young teen market, and those guys aren't going to read something that insults their intelligence. And without that market, things look bleak, because most people don't start collecting as adults, they start as "10 year olds".
But one should note that this comic is the adaption of the TV show. Like every other comic book adaption of a TV, whether it is Justice League Unlimited or this, they are always "lighter" than even the TV show.