Not at all, in fact I for one agree with you 100%. While admittedly the Character Reveal thing was interesting at first for Toy Story 3 (although in the long run it served very very little to actual plot or characterization of the film), by the second time around it’s really tiresome and almost tripe.
Not sure how many Anime fans are out there, but a really popular series out there is called Haruhi Suzumiya which is about a girl who obliviously has supernatural reality warping powers and unknown to her hangs out with a Time Travel, Esper and Alien/ Humanoid Robot. Well anyway, they had this one story arc called Endless Eight which was where the characters were stuck in a Time Loop had to repeat the exact same episode (albeit with different animation) exactly the same. And it went on for three frickin’ months (8 episode story arc)! Now Haruhi is a very very popular series and very very rarely ever makes new episodes, so admittedly fans were very disappointed about this, and found it to be a kind of cop out by the studio, as opposed to creating new episodes of the show rather than repeating the same one eight times.
My point is, is that no matter how good PIXAR does by promoting their new characters nothing can beat more views at the film’s storyline ie more new clips.