This was less and epilogue to Siege than to the Original Sentry series Paul Jenkins wrote around ten years ago.
Say what you will about where they've taken the character over the past several years, but I quite enjoyed the original concept. The idea that if Marvel had a Superman-type-character he would be royally fucked up in the head was awesome. Marketing gimmick aside, the mini was a fun departure in the 90's Marvel Knights style.
Bendis latched on and ran with it in a different direction. It's his choice to change around an origin as a writer putting his interpretation on a character - It's another story to have three different origin stories being told by two different writers at the same company at the same time. Bendis changed the origin. Then Jenkins put out a pointless 8 issue mini that was only worthwhile for the JRJR art that changed the origin again. Bendis took another shot at it last year in Dark Avengers where he made Bob a suped up junkie. Now that he's dead, Jenkins writes an epilogue in the style of the original series, revealing more about his forgotten past in the Marvel universe and forgets about everything after except that he's dead. (And it ridiculously sets him up for a return. )
This issue was a failure in every way but 2: It made me remember how much I enjoyed the original along with the way Jenkins used to write before he became a lazy journeyman writer during Civil War: Frontline, and the art from Tom Raney was more than competent.
Has he done anything since Annihilation: Conquest?