PSFan said:
I personally think with the inclusion of Seth Gabel as a regular, that AU Lincoln might fall for Our Universe Olivia until Peter comes back.
I suppose that's possible, but I think it's more likely to be Alt-Livia since she seemed to be harboring some feelings for Peter and thus preventing her from being with anyone else. With no Peter and no Henry, there shouldn't be a road block. Unless you bring back Frank, which leads me to...
It's really going to depend on how exactly they handle Peter's non-existence. That's going to be the can of worms. Is it like removing a brick and then watching the pieces fall into place and things not fitting quite correctly and thus causing some gaps occur? I think that's likely and they'll end up investigating these missing pieces and find Peter that way. Or are we going to assume that the lack of Peter has more far reaching consequences, like Walter's Elizabeth never committing suicide, Alt-Livia still being with Frank, for example. I just really hope they don't screw this up. There's such potential for messing this up, that the more I think about it, the more it scares me.
Late edit:
I think they almost have to go with first scenario I mentioned, only because, if you diverge too much from our original storyline, then the Walter and Olivia of our universe are completely different people and if they are, why do I care? They have to be as close to the characters we've been following from day 1 or we as viewers lose all history and connection with them. I'd much rather see a scenario (Dr Who?) where once they discover that Peter existed, they remember his history in their lives. But that's just me.