No. 8: Costumes
Getting those costumes you look at while reading comic books, onto the big screen can be difficult. Though getting the costumes into an animated movie is a lot easier than a live action one, the costumes from The Incredibles need to come back better than ever.
Now of course the original ones are perfect, but seeing more different and varied costumes would be exciting. Maybe the Parr family could get a more varied look, because, lets be honest, I doubt Dash and especially Violet would want to go through their teenage years in the same outfit as their parents. No teenager wants to dress matching with their entire family, even if it is a super one.