"Marvel doesn't care about The Incredibles because companies care more about style than substance."
Marvel doesn't care about it because they have no case. However, DC owns a trademark on the name Elastigirl, which is why she's called Mrs. Incredible these days (haven't seen the movie yet, though, so perhaps DC is letting them use it).
When you watch the Karate Kid movies, pay attention to the credits: they had to get permission from DC to use the name, since DC has a Karate Kid trademark and the movie was seen as being just a little too close to comics' concept.
So, if I create a superteam that's a ripoff of the Avengers, I'm fine, as long as they look somewhat different and don't use the same names. In fact, Marvel's Squadron Supreme is an example of their company creating a version of the JLA. At the same time, DC also created a version of the Avengers.
This comment was edited on Nov 13, 11:27.