That's one possibility. They want us to be left with no nails to bite with anticipation and maybe a random cop dies or maybe some character who only appeared in a couple of episodes. They have their reasons to make us believe this is gonna be big and since the season is ending in a cliffhanger anyway, they know we'll be there when they return. At least I will unless Stella is the one to die, which I think is unlikely. But of course! Where's the fun otherwise? They may even use the preview to confuse us even more.