Nice work, I like the zombie one but what does "Ambush: Rise of the living dead" mean?
It's a Keyword used in Secret Wars: Volume 1.
Basically, when it Ambushes, if the top card of your victory pile has Rise of the Living Dead (last Villain you beat essentially), then that Villain re-enters the city and its Ambush triggers starting the whole thing over again. And it effects every player.
Playing with the Marvel Zombies can mean you spend a turn beating the horde and they all comeback next turn.