What I mean is out of thousands of potential "that would never happen in a million years" scenarios, which is the most plausible to happen. So far we've seen The Master get resurrected (Season 8), Warren is still alive, Angel & co encountered Quortoth (the old one), and others.

At this point in either Btvs S9 or A&F would it be too far-fetched to speculate former big bads being resurrected and coming back (this already happened with the Master) like Glory or Adam? Or maybe the return of killed off allies like Tara, Anya, and Cordelia.

Not really sure where I'm going with this, just speculating because it seems like in the comics anything can happen and I just want to know what all of the seasoned Buffy & Angel comic veterans think about it.