A divorced man named Scott loves his adorable child (whose name starts with a C) very much but struggles with proving he is a capable father to his kind ex wife and her stern/ disagreeable but well meaning husband, who only want what is best for the kid.
Scott ends up acquiring a red suit that he had no intention of keeping. The red suit gives him special powers and his life changes drastically, and he starts working to understand this change. He at first is uncertain but eventually embraces his new role and his child is very proud of him, and after much struggle where his ex wife and her husband prefer he not see their child anymore, he finally wins them over and proves he really is a hero. All ends well.
There is also a woman with a dark bob haircut.
Now am I talking about The Santa Clause (1994) or Ant Man (2015)?