Well I’m pretty sure it will tie in to the main cast somehow. It usually always does.
That has not been the case, in my opinion. The past about the no one characters has been tied to the plot, not to the main characters. That’s the problem. I don’t care about Hades sad past, so whatever happens should be tied to the main characters character journey or just don’t show it.
For example, some people have said that Emma getting her jacket seems like a stupid flashback, but if it is directly tied to how bandit street kid Emma becomes epic and awesome bail bonds woman Emma and that directly ties into what is happening in her current present day character journey then that sounds like a great flashback.