I'm not dissing on him, I just don't know if his "powers" are a good fit with the team they have assembled now. It's hard for me to explain it. The team they have now (movie) have powers that in a way are kinda believable, or possibly could happen in a sense. Some of them don't even have "super" powers at all. Iron Man has a special suit, Hawkeye and Widow are assassins, Thor is an "alien", Cap is a man made super soldier and Hulk...well, has anger issues due to experimentation. Now, add in, say, Ant-Man, who can grow big or small and can control ants. Being someone who isn't into comics, as most people who saw The Avengers aren't, I just think it makes me not take it as seriously. I try to picture him in The Avengers movie, and I just can't see it without going....ummmmmmm no. He grows big and stomps on the aliens. He grows small and gets in Loki's ear. No.
Now if he was part of the Guardians, I would say he would fit better since, if I'm not mistaken, all of them have super powers.
As for the cartoon. I don't watch cartoons as much any more, especially ones like that. Disney or Pixar movies is about as far as I go. I don't even watch South Park as faithfully as I used to.