It's kind of an accepted rule in comics that no one ever really stays dead, with one exception being that of Uncle Ben Parker in Marvel. There have been a few alternate universe versions of him, but never a full-on revival of the character, and I really hope they never go through with one. While similar to Thomas and Martha Wayne in how their deaths inspired their descendants' vigilante careers, Spider-Man's moral com largely came from Ben, and while I don't think his revival would completely upend things for Peter, it would risk harming Ben's character.
