Yeah, I agree. As much as I want Glen to be alive, the show would lose basically all of its credibility if he was. It simply isn't believable.
I guess we'll see, however. I get the feeling that this going to be just like what happened with the Gov back in Season 3, where they left his death deliberately ambiguous to keep people guessing, just to show us that "Nope! He's been dead this whole time!" in the very next episode.
Also, Maggie and Glen actually did have a son together before he died in the comics. It really wouldn't be out of the question for her to turn up pregnant in the show as such.
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