I'm going to be as frank as I can.
Ultimate Spider-Man, airing twice every Sunday on DisneyXD, isn't the best animated incarnation of the wall-crawler. This is despite the creative pedigree involved. Spidey's co-creator, Stan Lee, is an executive producer and has a supporting role as a janitor on the show. Producer Eric Radomski and creative consultant Paul Dini are better known for their work on DC's universe of heroes. The Man of Action studio, which boasts talents like Duncan Fegredo and Steven T. Seagle, created Ben 10 & Generator Rex for Cartoon Network.
So where does it go wrong?
How about the fact that aside from some great artwork----and, oh, by the way, that's an improvement over the anime-inspired Spectacular Spider-Man from 2008---the visuals have a tendency to get too busy. Too many unnecessary bells & whistles to illustrate the overly expository narrative of the webhead himself (Drake Bell, ex-Drake & Josh). If you don't believe me, well, try this sample:
I get that the show is aimed at a younger audience. As I said, it airs twice (at least) on Sundays, in the morning, and in primetime, so that adults who don't catch it in the morning can watch. One of the show's producers is comics & television veteran Jeph Loeb, who has worked on shows like Lost & Heroes the last few years, and, according to frequent correspondent Magicdog, is aiming to replace the current Avengers series with one that will correspond to Ultimate Spider-Man. Has Loeb ever heard the phrase, if it isn't broken, don't fix it? Apparently not.