Jane will be going back and forth protecting Kurt (while he protects her too) and just trying to stay safe/get away from whatever is happening. She is honestly not built for this invisible shit and doesn't know what to do when she can't see what she's supposed to defend herself from.
Michonne is going to go full samurai the way she was back before she even knew Andrea and lived in woods alone. She'll want to touch base with the people she loves/cares about in Wonderland and since she's still healing will be a little slow on her feet. But that's literally never stopped her before and she'll hone all her abilities to fuck up some zombies as per usual while Andrea is probably like 'STOP YOU INJURED ASSHOLE' or something.
Henry is going to use a more fire bomb version of Freya's glitter bombs and lob fire in the direction of anything that sounds like undead death rattles. He'll eventually get backed into a fiery corner and need the pink power ranger to save him, thus continuing his life of only knowing women who came to kick ass and ask questions later. And the lesson that glitter is an important life tool as taught by Mabel at some point I'm sure will really hit home.
PANIC AT THE AU DISCO!
Jane is going to see a couple of different AU versions of her shitty life lmao:
Prison for the rest of her life because of her dick move with the terrorism thing.
But also not so terrible: This dream she has which can be used because lmao it's so far from canon reality right now it's an AU.
Michonne is only going to see an AU where her son never died, though the circumstances will be different: in one AU it will be the zombie apocalypse still, in one it won't.
Henry is just gonna have been raised by the Evil Queen and be her knight in the Enchanted Forest. It's part 'mom you don't need to kill people to prove a point' and part 'okay my mom burned down your village you better not try to kill her.'
Jane Doe, Michonne, Henry
PANIC AT THE AU DISCO!