There has to be. Necromorphs only survive in the presence of a Marker Signal and without it they turn into a soup-like sludge. So there has to be a Marker for there to be Necromorphs. That said, I don't plan on taking the same approach to Markers that the games did. Yes they are bad, and yes they drive people insane but it isn't the focus of this RP. The games are very "run and gun, destroy markers, be badass" whereas this roleplay will be more about trying to stay alive and getting home. But, that doesn't mean that including something with a Marker is off the table as there's plenty of room for it.