Yeah. Sue files papers. And if that wasn’t bad enough, she’s doing Namor. Which makes Namor go to war with the FF. Not that Namor ever needed an excuse to pitch a violent fit.
Along the way, Thundra decides to team up with the FF. Apparently, she liked her organized sparring match with Grimm so much, she’s decided she’s the only person who is allowed to hit him. Seriously. That’s the premise.
But there’s a happy ending, and the original four are the FF at last.