It was Michone in an 'alternate reality', forst if she hadn't saved what's her name blondie, and the idea that if we followed Negan's group from the get go maybe they'd be the goodies and Ricks group, who went in and basically murdered all these people, would be the baddies.
Morgan has crossed over to Fear the Walking Dead but I get confused about the time jump thing - I don't think they are at the same year as Walking Dead but Morgan was in that show last season.
I too can't remember what's happened to Maggie!
But I still love the show I think the Whisperers were great surprised they killed Alpha off.
I think the group Michone is now following will lead us to Rick eventually but she's off the show for now.