I thought it might be fun to come up with rules that tend to be followed in superhero fiction. It's okay to narrow down the rules a bit (e.g. comics,  Marvel Comics, 20th century, etc.) but don't make rules so specific that they only apply to one character or team.

1. Shrug Off the Lie Rule: In 20th century superhero fiction (much less so in the 21st century), upon learning the secret, characters will not be overly bothered by the fact that their superhero friend/family member has been lying them for years.

2. Much Said Fight Panels Rule: In comics, characters fighting can say as much as they feel like saying, even if the panel shouldn't allow that much time to pass.

3. Must... Recap! Rule: At the start of a story or issue (and probably some TV episodes), if the character is already in danger, a character must pause to reflect on what led to this point, be it a recap of a previous issue or new information that the reader/viewer doesn't already know.

4. Reminiscing About Recent Events Rule: In a comic or episode by way of recap, a character will discuss with another character things from within the last day or so that the other character would already know because both were there.

I'll stop here but this should give a start.