I reiterate, don't spoil it for yourself. Last chance.
Okay, so.
I'd pretend that in season 2 you're telling a whole separate story with brand new characters. Start with Abby and her crew in Seattle, at the equivalent of Day 1 in the sequel, and tell Abby's story with Lev, the Scars, and the WLF, and throughout it she hears about someone picking off her friends, until finally at the end of the season she gets to the theater and sees Tommy and Ellie, and tells her that she gave them a second chance and they wasted it.
And then you cut and go "4 months earlier" or whatever, and cut to Ellie being woken up by Jesse, who says it's time to go on patrol, and you end the season with the big question "What the naughty word happened that led to Ellie ending up in Seattle?"
And only in season 3 do you tell the story from Ellie's perspective.