So far we have gotten two similar hints about the Slaughter House Six, a glimpse in the Challenges document and an artwork tweet from Adam. But I'm very curious about where they are going to show up.
Ambuscade is certainly going to be returning in Villains of the Multiverse, but what about the other five members? The glowing orange guy, the Radioactivist, has already appeared in Proletariat's deck. That pretty much rules him showing up in Ambuscade's V5-style deck otherwise you could potentially have two Radioactivists out at the same time.
Does that mean Ambuscade and the rest of the Slaughter House Six will reappear in another incarnation post-Villains? That would be odd since then there would be three Ambuscade decks total, more than any other villain.
Where are these guys appearing? In Sentinel Tactics? The Mirror Woman (red and orange suit, orange hair, metal mask) is on the cover of the For Profit expansion. Maybe they will only show up in Tactics as a fully fledged team.
Do you think we will we ever get to fight a Slaughter House Six team in SOTM?