It starts at around 0:25.
They redesigned Zim and I have to say, he looks a little more childish but I can live with it. Looks like they are going for a CGI almost photo-realistic but cartoonly look this time. I don't know why but I don't like that. Also as seen in the preview, he is telling everyone in his school that the world is his. Including their signs. Overall, I think the new movie is worth a shot. Though I suggest that we should get used to Zim's new voice. He can barely speak it seems. He also doesn't know his colors.
(Well, happy I-didnt-plan-this-during-april-fools-but-who-cares-i-like-doing-bad-pranks)