it fgures that Lucius would try to use this attack to undermine James Potter and, at the same time, alienate others who could help against Voldemort; I'm certain that if he got James Potter replaced that the successor would be no where near as competent or would be already compromised by Voldemort. Meanwhile, it looks like Shymal is making some progress with his various efforts as is Remus with his. It would be rather interesting if Remus ended up in a relationship with the older sister of the one who turned him; that's got some interesting potential for conflicts.
Lucius had to be good for something. As for Remus, I'm not sure what's up with the appearance of Fenrir's sister. She just popped in there.