It's not really a surprise to me that Wolfram & Hart has returned. They were, after all about the only adversarial group on either series who managed to more or less survive more than a single season, they were more "irritated into leaving" than ever defeated, and only then, if I understood properly, their LA and Las Vegas bases. I am sort of surprised, though, that it would be Buffy, rather than Willow, who would be making the first contact with them. Considering the fact that Willow and W&H would both have a common interest in reestablishing magic in Buffy's universe, a temporary alliance between the two would have seemed a much more logical hook that a demon Facebook network. Even if Willow had no knowledge of them, they would certainly know about her, and would know that she would be fairly easy to manipulate. Then again, that might seem to be too similar to the Angel/Twilight connection from Season 8.