It's really too bad Mary Marvel wasn't one of those magical heroes who were around during "Day of Vengeance" and knows just how dangerous Eclipso can be, what with her seducing the Wrath of God into almost slaughtering everyone with a drop of magic in them. Oh, wait, she was.
Well, then, it's really too bad Mary wasn't one of Sue Dibny's best friends and attended her funeral along with every single other person in the DCU; if she was, she might've known that Jean Loring is a complete and raging psychopath who murdered her friend in a fit of mania. Oh, wait, she did that too.
Well, then, I guess it's too bad that people like Zatanna and Billy Batson weren't around just a few months back when Black Adam went crazy and went around killing everyone; if they were, maybe they'd realize just how dangerous Mary Marvel is right now what with her holding Black Adam's power and showing signs of violence beyond even his mindset and actually do something about it instead of hanging around in a big rock watching Veronica Mars or at Black Canary's bachelorette party getting sht-faced. Especially considering that she's Billy's sister and everything and he just left her to stew in a coma.
Oh, wait, they were.
So I guess the grand point of this story is that Mary is simply mind-controlled by shtty magic, since she's clearly not acting anything resembling how any sane person would logically act in her situation, and that everyone around her is too much of a dumbass to see it. Which, hey, sounds exactly like the plot of Amazons Attack, the quality of which this book is rapidly approaching.