But they are headed for the same city that lifeline is based on. Oh noooo!!!!
I received this message after the 12th siege in Lifeline:
So it looks like as Lifeline ends Marcus and Lilly blow up the barrier and head into the city... only to find it overrun with the undead. My guess is they are as good as dead! That or we'll end up playing in the city in Undead Labs Class IV mmorpg with characters like Marcus and Lilly as quest givers.