I really, really did not know whether or not to suggest X, because... I mean, X is one of my favorite series ever, but it’s also... oh, it’s a mess!  The pacing in that series is terrible and it’s unfinished and the SxS storyline does get resolution there, but it’s literally like six scenes.  Well, some long scenes, of course.  But it’s a lot to ask someone to read when it’s... complicated.  XD

In mine (I don't speak for Doctor-hollow! They might have a different idea haha~), I'm going with the fact that Shield haven't rebanded at all and Seth is still a 'traitor' albeit one with conflict and a growing concious. He's brainwashed (like 95% of those Bray/Sister Abigail sent into a state of living death----their spirits, not their bodies are travelling realms thus the 'Immortals' part ie. You can't KILL an 'idea' but you can sap it and bend it to your own purposes, and possibly break the body left behind an empty shell and we've already seen that Bray's interested in //souls// and not necessarily bodies) but regains his memories before he can bring major harm to Dean or Roman, then joining the rebellion. Strained relationships are abound, but hell, everyone wants to: I. Stop Bray/'Abigail' from acquiring strength from more imprisoned Immortals and possibly unifying the realms as to be able to affect what goes on at present earth. II. Get home**** ****Though Crow and I have agreed to some point that if the 'way home' is one person wide, Dean and Seth agreed without Roman's knowledge that Roman should go through it.

Your comment rubs me the wrong way.