Public spoilers! :O

I hope he's not there on behalf of Aro deeming Elspeth too dangerous. I have no idea why he'd do something like rebel though, but then we haven't exactly gotten any information on what goes on in the background. I guess it's also possible Addy developed the necessary heuristic to counteract Chelsea and spread it to Alec who for some reason doesn't want work for the Volturi and is for some reason now subduing Elspeth?

This is the most exciting we've had in a while. I just hope next chapter gives us at least a sliver of hope that things aren't going to continue to go so well for the Volturi.