Ultimate Spider-Man doesn't really talk down to kids, but it does talk to kids. From the start, though, the show was intended more for the 6-11 age group (the audience Disney XD wants the most) than anyone older. And the strategy appears to be working very well in that regard for the network.I think a Trek cartoon aimed at kids should indeed sell toys and a whole slew of related merchandise. Why should it be limited only to (mostly adult) collectors?Now Star Trek is not some super dark series and I do think most of the Star Trek episodes are fit for whole family, not being said I would hope some greedy exec wouldn't try to use a Star Trek cartoon to talk down to kids and try to sell them toys.
As far as talking down to kids, there are very few cartoons that do that anymore (and frankly, I can't think of any currently on the air really). Most shows are either target age-appropriate or tend to appeal to both kids and adults in some fashion. I'm still amazed at how many adults tune in to watch My Little Pony.
I would say the new Ultimate Spider-Man cartoon really talks down to kids, especially when the previous Spectacular Spider-Man did excellent job of telling the story of Spider-Man, while making the show still accessible to kids. There are still cartoon shows that talk down to kids.
The only cartoons that really do that anymore are shows mostly backed by toy companies like Pokemon, Beyblade, Bakugan, etc. For other cartoons like The Clone Wars and Young Justice, the toylines are a by-product because they're studio-backed properties. The same would be true for a new Star Trek cartoon.I don't mind selling merchandise related to the show to kids, I just wouldn't story lines to determined solely by merchandising concerns. In the 80s there were tons of cartoons, where irrelevant characters were on the show just to sell extra toys, where characters would get new powers and new costumes just to sell toys. In those shows selling toys was more important then stories. That's what I want to avoid.